{"id":32507,"date":"2023-06-30T17:19:12","date_gmt":"2023-06-30T15:19:12","guid":{"rendered":"https:\/\/ssef.ch\/?p=32507"},"modified":"2023-09-21T15:29:12","modified_gmt":"2023-09-21T13:29:12","slug":"cultured-pearl-with-unconventional-bead-material","status":"publish","type":"post","link":"https:\/\/www.ssef.ch\/zh-hans\/cultured-pearl-with-unconventional-bead-material\/","title":{"rendered":"Cultured pearl with unconventional bead material"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"32507\" class=\"elementor elementor-32507\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4ae10602 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-backgound-letter-holder-no qodef-elementor-content-no\" data-id=\"4ae10602\" 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-112861b6\" data-id=\"112861b6\" 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-8193a95 elementor-widget elementor-widget-text-editor\" data-id=\"8193a95\" 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<p><strong>by Dr. M.S. Krzemnicki, first published in <a href=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/05\/facette-2023-web.pdf\">Facette 28<\/a> (May 2023)<\/strong><\/p>\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-73a9759 elementor-widget elementor-widget-image\" data-id=\"73a9759\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"960\" height=\"420\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/06\/307_Fig1_unconventional-bead-material-jpg.webp\" class=\"attachment-full size-full wp-image-32518\" alt=\"\" srcset=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/06\/307_Fig1_unconventional-bead-material-jpg.webp 960w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/06\/307_Fig1_unconventional-bead-material-300x131.webp 300w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/06\/307_Fig1_unconventional-bead-material-768x336.webp 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 1: Cultured pearl of 24 mm diameter. The X-ray tomography section (right) reveals the unconventional bead material (dark grey) of this cultured pearl. Photo: SSEF<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\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-8ca6be6 elementor-widget elementor-widget-text-editor\" data-id=\"8ca6be6\" 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<p>Recently, we received a round pearl for testing which exhibited an excellent surface quality and a remarkable size of 24 mm in diameter. Interestingly, its weight of 60 ct was rather low for such a pearl (resulting in a calculated specific gravity of approx. 1.61 instead of 2.715 considered standard for a pearl). Using radiography and micro X-ray tomography, its identity as a beaded cultured pearl and the reason for this low weight was quickly revealed.<\/p><p>The saltwater cultured pearl contained an unconventional organic bead material, possibly similar to those described in 2013 in an article in the Australian Gemmologist (Cartier &amp; Krzemnicki, 2013: <a href=\"https:\/\/www.ssef.ch\/new-developments-in-cultured-pearl-production-use-of-organic-and-baroque-shell-nuclei\/\" target=\"_blank\" rel=\"noopener\">New developments in cultured pearl production: use of organic and baroque shell nuclei<\/a>.)<\/p><p>The Australian Gemmologist, Vol. 25, No. 1, pp. 6-13), accessible from the online library on the SSEF website. Nearly transparent to X-rays, this bead material showed no internal structure except a fine granular texture and some empty cavities (black) along the bead\/nacre interface. The cultured pearl was undrilled, so the identity of the bead material could not be further tested.<\/p><p>In terms of market acceptance, it might be interesting to see if more such cultured pearls arrive on the market in future. For us, it was the only one in the past few months. Another interesting aspect would be to see the long-term stability of such organic bead material, specifically if the pearl would be drilled and strung on a necklace.<\/p>\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-ae7f74b elementor-widget elementor-widget-spacer\" data-id=\"ae7f74b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-173ef6c elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-backgound-letter-holder-no qodef-elementor-content-no\" data-id=\"173ef6c\" 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-50 elementor-top-column elementor-element elementor-element-83c6548\" data-id=\"83c6548\" 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-f80100d elementor-widget elementor-widget-text-editor\" data-id=\"f80100d\" 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<h2>Want to learn more about pearls?<\/h2>\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-9b73a3c elementor-widget elementor-widget-image\" data-id=\"9b73a3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"694\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/07\/cta-pearl-course.jpeg\" class=\"attachment-large size-large wp-image-33477\" alt=\"\" srcset=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/07\/cta-pearl-course.jpeg 1024w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/07\/cta-pearl-course-300x203.webp 300w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/07\/cta-pearl-course-768x521.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\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-50 elementor-top-column elementor-element elementor-element-bc6225b\" data-id=\"bc6225b\" 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-4126683 elementor-widget elementor-widget-text-editor\" data-id=\"4126683\" 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>Start your journey to becoming an pearl expert with our free online course &#8220;Introduction to pearls&#8221;.<\/h4><p>Learn all about pearls. Their fascinating history, how they form, where they come from. Learn about all the different origins of pearls and their treatments. Take this course as an introduction to the wonderful world of pearls.<\/p>\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-9efef1a elementor-widget elementor-widget-laurits_core_button\" data-id=\"9efef1a\" 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\/masterclass\/pearl-en\/\" target=\"_self\"  >\n\t<span class=\"qodef-m-text\">Discover the course<\/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<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Recently, we received a round pearl for testing which exhibited an excellent surface quality and a remarkable size of 24 mm in diameter. Interestingly, its weight of 60 ct was rather low for such a pearl (resulting in a calculated specific gravity of approx. 1.61 instead of 2.715 considered standard for a pearl).<\/p>\n","protected":false},"author":3,"featured_media":32510,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[626],"tags":[724],"library_category":[],"library_author":[],"class_list":["post-32507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-blog","tag-pearl"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cultured pearl with unconventional bead material - SSEF<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ssef.ch\/zh-hant\/cultured-pearl-with-unconventional-bead-material\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cultured pearl with unconventional bead material - SSEF\" \/>\n<meta property=\"og:description\" content=\"Recently, we received a round pearl for testing which exhibited an excellent surface quality and a remarkable size of 24 mm in diameter. Interestingly, its weight of 60 ct was rather low for such a pearl (resulting in a calculated specific gravity of approx. 1.61 instead of 2.715 considered standard for a pearl).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ssef.ch\/zh-hant\/cultured-pearl-with-unconventional-bead-material\/\" \/>\n<meta property=\"og:site_name\" content=\"SSEF\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-30T15:19:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-21T13:29:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2023\/06\/unconventional-bead-material-jpg.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"338\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Laurent Cartier\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Laurent Cartier\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/\"},\"author\":{\"name\":\"Laurent Cartier\",\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hans\\\/#\\\/schema\\\/person\\\/c855f01c061d2c7b29f823eaee439288\"},\"headline\":\"Cultured pearl with unconventional bead material\",\"datePublished\":\"2023-06-30T15:19:12+00:00\",\"dateModified\":\"2023-09-21T13:29:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/\"},\"wordCount\":333,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hans\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ssef.ch\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/unconventional-bead-material-jpg.webp\",\"keywords\":[\"Pearl\"],\"articleSection\":[\"Research Blog\"],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/\",\"url\":\"https:\\\/\\\/www.ssef.ch\\\/zh-hant\\\/cultured-pearl-with-unconventional-bead-material\\\/\",\"name\":\"Cultured pearl with unconventional bead material - 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