{"id":19339,"date":"2022-10-18T18:29:16","date_gmt":"2022-10-18T16:29:16","guid":{"rendered":"https:\/\/ssef.ch\/research-library\/"},"modified":"2023-07-07T12:35:27","modified_gmt":"2023-07-07T10:35:27","slug":"recherches","status":"publish","type":"page","link":"https:\/\/www.ssef.ch\/fr\/recherches\/","title":{"rendered":"Recherches"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"19339\" class=\"elementor elementor-19339 elementor-14885\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c3e5001 elementor-section-full_width elementor-section-height-default elementor-section-height-default qodef-backgound-letter-holder-no qodef-elementor-content-no\" data-id=\"c3e5001\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-e8140d2\" data-id=\"e8140d2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9a93c36 elementor-widget-mobile__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"9a93c36\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1>Recherches<\/h1>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-f8fec51\" data-id=\"f8fec51\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8e7ad9d elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"8e7ad9d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>Search for articles<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da720b5 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"da720b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<form data-min-no-for-search=1 data-result-box-max-height=400 data-form-id=29976 class=\"is-search-form is-form-style is-form-style-1 is-form-id-29976 is-ajax-search\" action=\"https:\/\/www.ssef.ch\/fr\/\" method=\"get\" role=\"search\" ><label for=\"is-search-input-29976\"><span class=\"is-screen-reader-text\">Search for:<\/span><input  type=\"search\" id=\"is-search-input-29976\" name=\"s\" value=\"\" class=\"is-search-input\" placeholder=\"Search here...\" autocomplete=off \/><span class=\"is-loader-image\" style=\"display: none;background-image:url(https:\/\/www.ssef.ch\/wp-content\/plugins\/add-search-to-menu\/public\/images\/spinner.gif);\" ><\/span><\/label><input type=\"submit\" value=\"Ok\" class=\"is-search-submit\" \/><input type=\"hidden\" name=\"id\" value=\"29976\" \/><input type=\"hidden\" name=\"post_type\" value=\"post\" \/><\/form>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f56c174 elementor-widget elementor-widget-text-editor\" data-id=\"f56c174\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>Categories<\/h4><p><a href=\"\/fr\/recherches-fr\/\">Recherches<\/a>\u00a0\u00a0<img decoding=\"async\" class=\"alignnone wp-image-23654\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/05\/france.png\" alt=\"\" width=\"25\" height=\"25\" \/><br \/><a href=\"https:\/\/www.ssef.ch\/fr\/category\/research-blog\/\">Research Blog<\/a><br \/><a href=\"https:\/\/www.ssef.ch\/fr\/category\/research-articles\/\">Research Articles<\/a><br \/><a href=\"https:\/\/www.ssef.ch\/fr\/category\/presentations\/\">Presentations<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-224ee01\" data-id=\"224ee01\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a1f074e elementor-widget elementor-widget-sidebar\" data-id=\"a1f074e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"sidebar.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"widget widget_tag_cloud\" data-area=\"research-column-2\"><h4 class=\"qodef-widget-title\">Tags<\/h4><div class=\"tagcloud\"><a href=\"https:\/\/www.ssef.ch\/fr\/tag\/agedating\/\" class=\"tag-cloud-link tag-link-739 tag-link-position-1\" style=\"font-size: 11.60396039604pt;\" aria-label=\"Age Dating (17 \u00e9l\u00e9ments)\">Age Dating<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/diamond\/\" class=\"tag-cloud-link tag-link-725 tag-link-position-2\" style=\"font-size: 20.059405940594pt;\" aria-label=\"Diamond (73 \u00e9l\u00e9ments)\">Diamond<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/dna\/\" class=\"tag-cloud-link tag-link-738 tag-link-position-3\" style=\"font-size: 11.881188118812pt;\" aria-label=\"DNA (18 \u00e9l\u00e9ments)\">DNA<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/emerald\/\" class=\"tag-cloud-link tag-link-727 tag-link-position-4\" style=\"font-size: 18.673267326733pt;\" aria-label=\"Emerald (58 \u00e9l\u00e9ments)\">Emerald<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/gemmology\/\" class=\"tag-cloud-link tag-link-742 tag-link-position-5\" style=\"font-size: 21.445544554455pt;\" aria-label=\"Gemmology (93 \u00e9l\u00e9ments)\">Gemmology<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/geochemistry\/\" class=\"tag-cloud-link tag-link-741 tag-link-position-6\" style=\"font-size: 16.732673267327pt;\" aria-label=\"Geochemistry (42 \u00e9l\u00e9ments)\">Geochemistry<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/jade\/\" class=\"tag-cloud-link tag-link-743 tag-link-position-7\" style=\"font-size: 8pt;\" aria-label=\"Jade (9 \u00e9l\u00e9ments)\">Jade<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/methods\/\" class=\"tag-cloud-link tag-link-730 tag-link-position-8\" style=\"font-size: 16.871287128713pt;\" aria-label=\"Methods (43 \u00e9l\u00e9ments)\">Methods<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/organics\/\" class=\"tag-cloud-link tag-link-740 tag-link-position-9\" style=\"font-size: 12.712871287129pt;\" aria-label=\"Organics (21 \u00e9l\u00e9ments)\">Organics<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/origins\/\" class=\"tag-cloud-link tag-link-733 tag-link-position-10\" style=\"font-size: 18.950495049505pt;\" aria-label=\"Origins (61 \u00e9l\u00e9ments)\">Origins<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/othergemstones\/\" class=\"tag-cloud-link tag-link-736 tag-link-position-11\" style=\"font-size: 21.722772277228pt;\" aria-label=\"Other Gemstones (97 \u00e9l\u00e9ments)\">Other Gemstones<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/pearl\/\" class=\"tag-cloud-link tag-link-724 tag-link-position-12\" style=\"font-size: 22pt;\" aria-label=\"Pearl (101 \u00e9l\u00e9ments)\">Pearl<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/ruby\/\" class=\"tag-cloud-link tag-link-728 tag-link-position-13\" style=\"font-size: 17.980198019802pt;\" aria-label=\"Ruby (51 \u00e9l\u00e9ments)\">Ruby<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/sapphire\/\" class=\"tag-cloud-link tag-link-726 tag-link-position-14\" style=\"font-size: 19.089108910891pt;\" aria-label=\"Sapphire (62 \u00e9l\u00e9ments)\">Sapphire<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/spinel\/\" class=\"tag-cloud-link tag-link-735 tag-link-position-15\" style=\"font-size: 12.158415841584pt;\" aria-label=\"Spinel (19 \u00e9l\u00e9ments)\">Spinel<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/synthetics\/\" class=\"tag-cloud-link tag-link-732 tag-link-position-16\" style=\"font-size: 16.039603960396pt;\" aria-label=\"Synthetics (37 \u00e9l\u00e9ments)\">Synthetics<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/tourmaline\/\" class=\"tag-cloud-link tag-link-734 tag-link-position-17\" style=\"font-size: 13.960396039604pt;\" aria-label=\"Tourmaline (26 \u00e9l\u00e9ments)\">Tourmaline<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/traceability\/\" class=\"tag-cloud-link tag-link-737 tag-link-position-18\" style=\"font-size: 12.435643564356pt;\" aria-label=\"Traceability (20 \u00e9l\u00e9ments)\">Traceability<\/a>\n<a href=\"https:\/\/www.ssef.ch\/fr\/tag\/treatments\/\" class=\"tag-cloud-link tag-link-731 tag-link-position-19\" style=\"font-size: 21.306930693069pt;\" aria-label=\"Treatments (90 \u00e9l\u00e9ments)\">Treatments<\/a><\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-80dbd80\" data-id=\"80dbd80\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cb82b5d elementor-widget elementor-widget-laurits_core_button\" data-id=\"cb82b5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"laurits_core_button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<a class=\"qodef-shortcode qodef-m qodef-button qodef-layout--filled qodef-html--link\" href=\"https:\/\/www.ssef.ch\/ssef-facette\/\" target=\"_self\"  >\n\t<span class=\"qodef-m-text\">Facette magazine<\/span>\n<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5aee6b7 elementor-section-full_width elementor-section-height-default elementor-section-height-default qodef-backgound-letter-holder-no qodef-elementor-content-no\" data-id=\"5aee6b7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a9ec30a\" data-id=\"a9ec30a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0898306 elementor-widget elementor-widget-laurits_core_blog_list\" data-id=\"0898306\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"laurits_core_blog_list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"qodef-shortcode qodef-m qodef-blog qodef-item-layout--info-bottom qodef-item-border--no qodef-side-border--on qodef-hover-animation--no qodef-appear-animation--no qodef-grid qodef-layout--columns qodef-gutter--huge qodef-col-num--3 qodef-item-layout--info-bottom qodef-pagination--on qodef-pagination-type--infinite-scroll qodef-responsive--predefined\" 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data-appearing-delay=\"0\">\n\t\t<div class=\"qodef-grid-inner clear\">\n\t\t<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47669 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-ruby\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/winza-ruby-with-hollow-tube-as-a-helix\/\">\n\t\t\t<img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Winza-ruby-with-hollow-tube-as-a-helix-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/winza-ruby-with-hollow-tube-as-a-helix\/\">\n\t\tWinza ruby with hollow tube as a helix\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">In late 2007, a new deposit of rubies was discovered near the village of Winza in central Tanzania, creating quite a stir in the trade due to the quality and vivid colour of these rubies.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47771 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-diamond\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/eclogitic-orange-yellow-diamonds-coloured-by-the-480-nm-band\/\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/eclogitic-orange-yellow-diamonds-coloured-by-the-480-nm-band-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/eclogitic-orange-yellow-diamonds-coloured-by-the-480-nm-band\/\">\n\t\tEclogitic orange-yellow diamonds coloured by the 480 nm band\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">We recently acquired three orange-yellow diamonds for the SSEF collection research. These diamonds immediately retained our attention when we did the UV-vis-NIR spectra to identify the defect at the o<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47936 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-pearl\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/old-cultured-pearl-necklaces\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Old-cultured-pearl-necklaces-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/old-cultured-pearl-necklaces\/\">\n\t\tOld cultured pearl necklaces\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Recently, the SSEF received three pearl necklaces for testing. Each necklace had a clasp containing diamonds and what appeared to be a sapphire. The pearls were graduated in size, with a small knot\nse<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47747 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-spinel\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/fissure-filling-in-spinel\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Fissure-filling-in-spinel-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/fissure-filling-in-spinel\/\">\n\t\tFissure filling in spinel\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">The practice of filling fissures with a colourless substance, such as oil, wax or artificial resin, has been common in the gemstone trade for many decades, if not centuries.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47912 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-geochemistry\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/bachelor-thesis-on-heated-blue-zircon-from-different-origins\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Bachelor-thesis-on-heated-blue-zircon-from-different-origins-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/bachelor-thesis-on-heated-blue-zircon-from-different-origins\/\">\n\t\tBachelor thesis on heated blue zircon from different origins\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Zircon (ZrSiO4) is a common accessory mineral found in rocks, as well as an inclusion in gemstones, primarily corundum. Zircon is also known as a gemstone in its own right, either colourles<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-48014 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-geochemistry tag-methods\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/spectrofluorometer-new-instrument-at-ssef\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Spectrofluorometer-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/spectrofluorometer-new-instrument-at-ssef\/\">\n\t\tSpectrofluorometer: New instrument at SSEF\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">We have acquired a new instrument at SSEF: a JASCO FP-8550 spectrofluorometer. A spectrofluorometer is a device that can measure fluorescence excitation and emission spectra.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47646 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-origins\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/ssef-gemtrack-documenting-the-journey-of-a-gemstone\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/SSEF-GemTrack-the-journey-of-a-gemstone-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/ssef-gemtrack-documenting-the-journey-of-a-gemstone\/\">\n\t\tSSEF GemTrack: Documenting the journey of a gemstone\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Launched in 2019, the SSEF GemTrackTM service is asked by more of our clients every year. This tracking service not only documents the journey of a gemstone in time, but is also an attracti<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47834 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-tourmaline\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/an-uncommon-artificial-resin-feature-in-a-brazilian-paraiba-tourmaline\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/An-uncommon-artificial-resin-feature-in-a-brazilian-Paraiba-tourmaline-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/an-uncommon-artificial-resin-feature-in-a-brazilian-paraiba-tourmaline\/\">\n\t\tAn uncommon artificial resin feature in a brazilian Paraiba tourmaline\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Recently, we examined a vibrant Brazilian Paraiba tourmaline weighing approximately 6 carats. One particular internal feature stood out that we found interesting for sharing.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47801 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-diamond\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/cvd-synthetic-diamond-with-colour-shift\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/CVD-synthetic-diamond-with-colour-shift-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/cvd-synthetic-diamond-with-colour-shift\/\">\n\t\tCVD synthetic diamond with colour shift\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Last November, the SSEF received an interesting round brilliant colourless (with a greyish tint) diamond of ca. 0.7 ct. mounted on an earring for testing.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47458 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-emerald\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/emeralds-from-the-minas-canaa-minas-gerais-brazil\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Emeralds-from-the-Minas-Canaa-Minas-Gerais-Brazil-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/emeralds-from-the-minas-canaa-minas-gerais-brazil\/\">\n\t\tEmeralds from the Minas Cana\u00e3, Minas Gerais, Brazil\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">In September 2024, the SSEF had the privilege of testing a few emeralds from the Mina Cana\u00e3, some of which exhibited exceptional qualities. Impressive in terms of weight, clarity and colour, these st<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47960 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-pearl\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/cultured-south-sea-pearls-with-small-beads\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Cultured-South-Sea-pearls-with-small-beads-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/cultured-south-sea-pearls-with-small-beads\/\">\n\t\tCultured South Sea pearls with small beads\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Identifying beaded cultured pearls is usually quite straightforward, as such pearls often contain a large bead made from a freshwater shell with a nacre layer only 1.5 mm or less thick.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-48062 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-diamond tag-jade tag-othergemstones tag-tourmaline\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/fake-it-til-you-break-it-oddities-and-fraud-cases-submitted-to-ssef\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Oddities-and-fraud-cases-submitted-to-SSEF-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/fake-it-til-you-break-it-oddities-and-fraud-cases-submitted-to-ssef\/\">\n\t\tFake it \u2018til you break it: Oddities and fraud cases submitted to SSEF\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Apart from beautiful and exceptional gemstones, the SSEF also gets from time-to-time submissions which clearly fall far from that prestigious range.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47978 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-agedating tag-jade\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/age-dating-of-burmese-jadeite\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Age-dating-of-burmese-jadeite-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/age-dating-of-burmese-jadeite\/\">\n\t\tAge dating of burmese jadeite\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Recently, the SSEF received a strand of Burmese jadeite jade beads for testing. The beads were slightly graduated with a diameter ranging from 8 to 11 mm and exhibited a beautifully saturated and\nhomo<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47717 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-tourmaline\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/purple-substance-in-hollow-tubes-to-mimic-unheated-paraiba-tourmaline\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Purple-substance-in-hollow-tubes-to-mimic-unheated-Paraiba-tourmaline-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/purple-substance-in-hollow-tubes-to-mimic-unheated-paraiba-tourmaline\/\">\n\t\tPurple substance in hollow tubes to mimic unheated Paraiba tourmaline\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Recently, the SSEF received a 14-carat, light blue, copper-bearing tourmaline for testing. Based on trace element concentrations, its Mozambique origin was readily established.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-48044 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-diamond tag-methods\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/phosphorescence-spectrometry-of-diamonds\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Phosphorescence-spectrometry-of-diamonds-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/phosphorescence-spectrometry-of-diamonds\/\">\n\t\tPhosphorescence spectrometry of diamonds\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">The JASCO FP-8550 spectrofluorometer. The instrument has a variety of applications. Here, we report on the phosphorescence lifetime study of a 0.705 ct, round, brilliant-cut, colourless (H\/VS1),\nnatur<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47888 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-sapphire\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/study-on-sapphires-with-exotic-elements-and-implications-for-heat-treatment-detection\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Study-on-sapphires-with-22exotic22-elements-and-implications-for-heat-treatment-detection-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/study-on-sapphires-with-exotic-elements-and-implications-for-heat-treatment-detection\/\">\n\t\tStudy on sapphires with \u00ab\u00a0exotic\u00a0\u00bb elements and implications for heat treatment detection\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">In a recent study, we analysed a series of unheated gem-quality sapphires containing \u2018exotic\u2019 elements such as Sn, Nb, Zr, Ta, W, also known as high-field-strength elements.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-47996 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-agedating\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/age-dating-quality-control\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Age-dating-quality-control-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/age-dating-quality-control\/\">\n\t\tAge dating quality control\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Knowing the age of a gemstone can be valuable when determining its origins. Unfortunately, most gemstones cannot be dated directly. However, it is possible to determine the age of certain inclusions c<\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n<article class=\"qodef-e qodef-blog-item qodef-grid-item qodef-item--custom post-48104 post type-post status-publish format-standard has-post-thumbnail hentry category-research-blog tag-diamond\">\n\t<div class=\"qodef-e-inner\">\n\t\t<div class=\"qodef-e-content-holder\">\n\t\t\t<div class=\"qodef-e-media-image\">\n\t\t<a itemprop=\"url\" href=\"https:\/\/www.ssef.ch\/fr\/renaissance-point-cut-diamond-and-gold-ring\/\">\n\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/Renaissance-point-cut-diamond-and-gold-ring-600x400.jpg\" alt=\"\" width=\"600\" height=\"400\" data-ratio=\"1.5\" \/>\t\t<\/a>\n\t<\/div>\n\t\t<div class=\"qodef-e-content\">\n\t\t\t<div class=\"qodef-e-top-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t<a itemprop=\"dateCreated\" href=\"https:\/\/www.ssef.ch\/fr\/2026\/04\/\" class=\"\">\n\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" width=\"16\" height=\"14\" viewBox=\"0 0 16 14\">\n\t\t<g>\n\t\t\t<rect width=\"16\" height=\"14\"\/>\n\t\t\t<rect x=\"0.5\" y=\"0.5\" width=\"15\" height=\"13\"\/>\n\t\t<\/g>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(3 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(7 8)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 4)\"\/>\n\t\t<rect width=\"2\" height=\"2\" transform=\"translate(11 8)\"\/>\n\t<\/svg>\n\t2026<\/a>\n<div class=\"qodef-info-separator-end\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-text\">\n\t\t\t\t<h4 itemprop=\"name\" class=\"qodef-e-title entry-title\" >\n\t<a itemprop=\"url\" class=\"qodef-e-title-link\" href=\"https:\/\/www.ssef.ch\/fr\/renaissance-point-cut-diamond-and-gold-ring\/\">\n\t\tRenaissance point cut diamond and gold ring\t<\/a>\n<\/h4>\n\t\t<p itemprop=\"description\" class=\"qodef-e-excerpt\">Since the beginning of human history, jewellery has been created, with its materials, including gemstones and precious metals, being reused to make new pieces. <\/p>\n\t\t\t\t<\/div>\n\t\t\t<div class=\"qodef-e-bottom-holder\">\n\t\t\t\t<div class=\"qodef-e-info\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/article>\n\t<\/div>\n\t\t<div class=\"qodef-m-pagination qodef--infinite-scroll\">\n\t\t<svg class=\"qodef-m-pagination-spinner\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"512\" height=\"512\" viewBox=\"0 0 512 512\"><path d=\"M304 48c0 26.51-21.49 48-48 48s-48-21.49-48-48 21.49-48 48-48 48 21.49 48 48zm-48 368c-26.51 0-48 21.49-48 48s21.49 48 48 48 48-21.49 48-48-21.49-48-48-48zm208-208c-26.51 0-48 21.49-48 48s21.49 48 48 48 48-21.49 48-48-21.49-48-48-48zM96 256c0-26.51-21.49-48-48-48S0 229.49 0 256s21.49 48 48 48 48-21.49 48-48zm12.922 99.078c-26.51 0-48 21.49-48 48s21.49 48 48 48 48-21.49 48-48c0-26.509-21.491-48-48-48zm294.156 0c-26.51 0-48 21.49-48 48s21.49 48 48 48 48-21.49 48-48c0-26.509-21.49-48-48-48zM108.922 60.922c-26.51 0-48 21.49-48 48s21.49 48 48 48 48-21.49 48-48-21.491-48-48-48z\"><\/path><\/svg>\t<\/div>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Recherches Search for articles Categories Recherches\u00a0\u00a0Research BlogResearch ArticlesPresentations Facette magazine No posts were found for provided query parameters.<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-full-width.php","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-19339","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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