{"id":37937,"date":"2024-06-06T16:19:33","date_gmt":"2024-06-06T14:19:33","guid":{"rendered":"https:\/\/ssef.ch\/?p=37937"},"modified":"2024-06-10T17:37:50","modified_gmt":"2024-06-10T15:37:50","slug":"pigeon-blood-red-ruby-from-vietnam","status":"publish","type":"post","link":"https:\/\/www.ssef.ch\/zh-hant\/pigeon-blood-red-ruby-from-vietnam\/","title":{"rendered":"Pigeon blood red ruby from Vietnam"},"content":{"rendered":"\t\t
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By Dr. M.S. Krzemnicki, first published in Facette 29<\/a> (May 2024)<\/strong><\/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\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Figure 1: 2.10 ct ruby from Vietnam (left), colour grading of rubies at SSEF (right). Photos: 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
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Recently, a beautiful Vietnamese ruby of 2.10 ct and vivid red colour was submitted to SSEF for testing. Microscopic observations and chemical trace element analysis confirmed its Vietnamese origin and our colour grading protocol revealed that this stone was well fitting to be called \u2018pigeon blood red\u2019 based on SSEF standards.<\/p>

Although most rubies which have been classified by SSEF as \u2018pigeon blood red\u2019 are of Burmese origin (Mogok or Mong Hsu), we have seen in the past also rubies from other gem deposits such as Vietnam – as the above-described gem -, Tajikistan, and even East Africa which were fitting to be called \u2018pigeon blood red\u2019.<\/p>

The SSEF applies strict criteria to classify a ruby as \u2018pigeon blood red\u2019. Apart from the saturated and vivid red colour which is compared with a set of ruby master stones, the ruby must be untreated (e.g. no indications of heating and\/or clarity modification) and show a strong red fluorescence under UV light. It is important to know that the geographic origin is not a criterion at SSEF and therefore the term \u2018pigeon blood red\u2019 is applied and mentioned on our report if the listed criteria are met.<\/p>

A detailed description of the criteria for \u2018pigeon blood red\u2019 rubies (and \u2018royal blue\u2019 sapphires) is found on our SSEF website (https:\/\/www.ssef.ch\/pigeon-blood-red-royal-blue\/<\/a>) and in SSEF Facette 2016<\/a> (pages 8-9).<\/p><\/div><\/div><\/div>\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\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Recently, a beautiful Vietnamese ruby of 2.10 ct and vivid red colour was submitted to SSEF for testing. Microscopic observations and chemical trace element analysis confirmed its Vietnamese origin and our colour grading protocol revealed that this stone was well fitting to be called \u2018pigeon blood red\u2019 based on SSEF standards.<\/p>\n","protected":false},"author":3,"featured_media":37963,"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":[728],"library_category":[],"library_author":[],"class_list":["post-37937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-blog","tag-ruby"],"acf":[],"yoast_head":"\nPigeon blood red ruby from Vietnam - 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\/pigeon-blood-red-ruby-from-vietnam\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pigeon blood red ruby from Vietnam - SSEF\" \/>\n<meta property=\"og:description\" content=\"Recently, a beautiful Vietnamese ruby of 2.10 ct and vivid red colour was submitted to SSEF for testing. 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