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.
Blue Sapphires From a New Deposit Near Andranondambo, Madagascar (英语)
A recent rush in Madagascar yields new sapphire production.
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.
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.
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.
Pezzottaite Debuts as the Newest Trapiche Gem Mineral (英语)
A rare mineral acquired along the Thai-Myanmar border exhibits the distinctive six-spoke pattern associated with trapiche.
Irradiated Green-Blue CVD Synthetic Diamonds (英语)
Advancing CVD growth technologies yield intensely colored, high-quality synthetic diamonds, such as the two green-blue synthetic materials seen in the New York lab.
Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation (英语)
Proposes a model for trapiche emerald formation based on petrographic, spectroscopic, and chemical examination.
Large Colorless HPHT-Grown Synthetic Gem Diamonds from New Diamond Technology, Russia (英语)
Examines a new source of colorless and near-colorless gem-quality HPHT synthetic diamonds using spectroscopic and gemological analysis.
在 GIA 鉴定所鉴别出的近无色的米粒尺寸高压高温 (HPHT) 合成钻石 (英语)
The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.
LPHT 热锻的粉红色 CVD 合成钻石 (英语)
The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.
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