Unusual “Horsetail” and Columnar Inclusions in Demantoid
Examination of a yellowish green demantoid reveals fibers of serpentine in a randomly curved pattern and a columnar two-phase negative crystal.
Extremely Rare Hellandite Inclusion Found in a Mogok Ruby
A rare inclusion is reported in ruby from the Mogok mine for the first time.
Four-Rayed Star Chrysoberyl
A unique combination of two intersecting cat’s-eyes is observed in chrysoberyl at the Tokyo laboratory.
Fluorescence Characteristics of Two Copper-Diffused Plagioclase Feldspars: Labradorite and Andesine
Examines the use of strong fluorescence near 394 nm under 320 nm excitation as a potential means of identifying copper diffusion treatment of feldspar.
Composition and Spectral Characteristics of Porcelain-Treated Turquoise
Characterizes turquoise treated with an inorganic additive that dramatically improves the luster and color of low- and medium-quality material.
Never Stop Innovating: Gem Artist Chi Huynh
Profiles a groundbreaking gem artist on a quest to bring new concepts, techniques, and products to the industry.
Gems Formed in Magmatic Rocks
This installment of “Colored Stones Unearthed” covers gemstones that formed in magmatic environments and the insights they offer into the evolution of the earth and the geological processes that shaped our world.
A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese Ruby
Documents heating experiments conducted on Burmese rubies to find useful indicators of heat treatment at temperatures below 1200°C.
Low-Temperature Heating of Mogok Ruby, Copper-Diffused Feldspar, Porcelain-Treated Turquoise, and the Work of Gem Artist Chi Huynh
An overview of the Winter 2022 Gems & Gemology content.
Fall 2022 Auction Highlights
A successful spring season set high expectations for colored diamonds at auction in late 2022.
Omphacite in Pink Diamond
A bluish green omphacite crystal is discovered in a Fancy brown-pink diamond.
GIA推出更新及经济的实验室培育钻石精简版报告
grading and identification organization, is now offering a lower-cost GIA Laboratory-Grown Diamond Report - Dossier. 185 / 5,000 Translation results Translation result 美国宝石学院 (GIA) 是领先的宝石学分级和鉴定机构，现在提供成本更低的 GIA 实验室制造钻石报告 - 卷宗。
GIA推出更新及经济的实验室培育钻石精简版报告
grading and identification organization, is now offering a lower-cost GIA Laboratory-Grown Diamond Report - Dossier. 185 / 5,000 Translation results Translation result 美国宝石学院 (GIA) 是领先的宝石学分级和鉴定机构，现在提供成本更低的 GIA 实验室制造钻石报告 - 卷宗。
New Year, New Digital GIA Report
The start of 2023 marks a significant milestone in the digital transformation of the global diamond industry - the launch of the fully digital GIA Diamond Dossier, the most widely available diamond grading report in the world.
GIA 团队与 Alan Revere（阿兰·里维尔）合作改进研究珠宝学家 (Graduate Jeweler) 课程
作为宝石学教育、研究以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 与金匠大师兼备受赞誉的珠宝设计师 Alan Revere（阿兰·里维尔）开展合作，以期改进 GIA 的研究珠宝学家 (Graduate Jeweler) 课程。
GIA 研究人员展示新发现
11 月 1 日至 3 日，美国宝石研究院在加州卡尔斯巴德的 GIA 全球总部召开第 16 届年度研究会，100 名 GIA 研究员、知名学者、独立行业专家以及 GIA 理事和高管通过现场和虚拟参会。
Cat’s-Eye Paraíba Tourmaline with Copper Inclusions
The Tokyo laboratory examines a Paraíba tourmaline with chatoyancy caused by copper inclusions.
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