Research Article Search Results
Ring with a CVD Synthetic Melee Diamond (英语)
A round-cut specimen set in a ring is the first mounted CVD synthetic melee diamond identified by GIA.
最大的蓝色高温高压合成钻石 (英语)
Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.
Analysis of Yellow Diamond Melee for Color Treatment and Synthetics (英语)
A parcel revealed to contain natural, treated, and synthetic diamonds reinforces the importance of identification.
Paula Crevoshay’s American Collection, Plus Jewelry with Nontraditional Gemstones (英语)
Lesser-known gem materials are seen in pieces alongside a collection created as an artistic inheritance for future generations of jewelry fans.
Large Colorless HPHT Synthetic Gem Diamonds from China (英语)
A report on the HPHT growth of large, gem-quality colorless synthetic diamonds in China.
Blue Sapphires From a New Deposit Near Andranondambo, Madagascar (英语)
A recent rush in Madagascar yields new sapphire production.
Red Cordierite from Madagascar (英语)
The gemological properties of the first documented occurrence of red cordierite, from Madagascar, are examined.
璀璨内陆：探秘澳大利亚的蛋白石矿场 (英语)
Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah, and Quilpie.
石墨内含物形成钻石的八面体轮廓 (英语)
An inclusion outlined by minute graphite crystals within a diamond create an octahedral shape.
Two Large CVD-Grown Synthetic Diamonds Tested by GIA (英语)
Two near-colorless rounds, weighing 3.23 and 2.51 ct, were the largest CVD-grown synthetic diamonds GIA has examined.
马达加斯加 Zahamena 国家公园的一个新矿床出产的红宝石 (英语)
A field expedition from GIA Bangkok explores a new ruby deposit and collects specimens for study.
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