拍卖行：主要钻石和有色宝石的强大市场影响 (英语)
A report on how high-profile jewelry auctions have affected the gem and jewelry market.
Enriching a Tradition
We’re placing a remarkable resource—almost 80 years—of groundbreaking gemological knowledge at your fingertips.
Infrared Spectroscopic Study of Filled Moonstone
A study on how infrared spectroscopy provides conclusive evidence of impregnated moonstone.
Gemological Characteristics of Saltwater Cultured Pearls Produced After Xenotransplantation
未告知的大颗 CVD 合成钻石样品 (英语)
In mid-2012, one of the international diamond grading laboratories in Antwerp reported undisclosed CVD synthetic diamonds, causing a stir in the diamond industry.
Green Diamond, Treated with Radioactive Salt
The stone owes all of its green color to these shallow radiation stains.
含聚合氮杂质的 CVD 合成钻石 (英语)
Recently, an unusual 0.94 ct Fancy yellow-brown emerald cut was submitted to GIA for a synthetic diamond grading report. It contained a cloud of black needle-like inclusions occurring along a plane and showed weak green transmission with fiber-optic illumination.
巨大的 CVD 制造合成钻石 (英语)
The New York laboratory recently tested a 2.16 ct CVD synthetic from Scio Diamond Technology Corp., the largest specimen GIA has seen so far.
提交至孟买鉴定所的三颗 CVD 合成钻石 (英语)
The gemological and spectroscopic characteristics of these type IIa synthetic diamonds suggested that they experienced different growth and/or treatment histories.
Rare Double-Trapiche Emerald
At the AGTA show, Equatorian Imports showed this contributor two pieces of emerald with a very rare double-trapiche pattern
Dumortierite-Quartz Rock Presented as Sapphire
The Gem Testing Laboratory of Jaipur, India, received for identification an opaque blue specimen, submitted as sapphire.
Musgravite from Myanmar
Two small, near-colorless stones reportedly from Myanmar were loaned to GIA for examination.
Large HPHT-Treated Fancy Pink Diamond
The New York lab encountered another large HPHT-treated diamond that showed stronger pink coloration.
A Comparison of Modern and Fossil Ivories Using Multiple Techniques
This article provides identification criteria to distinguish between modern and fossil (mammoth) elephant ivory.
Pseudo-Synthetic Growth Structure Observed in Natural Diamond
This stone was a good example of a very rare natural diamond exhibiting synthetic growth characteristics.
Petrochemical Characteristics and Genesic Significance of Luodian Jade from Guizhou
Aviat Diamonds: A Window into the Deep Lithospheric Mantle Beneath the Northern Churchill Province, Melville Peninsula, Canada
Une Découverte Exceptionnelle de Béryls Gemmes à Chaves, District de Vila Real, Portugal [An Exceptional Find of Gemmy Beryls at Chaves, District of Vila Real, Portugal]
The numerous pegmatites in Northern Portugal are known as sources of fine mineral specimens for mineral collectors.
Trade Fair & Play Fair, Says Gem Trade
Consumer confidence and globalization has led to increasing public awareness of how the goods are made and where they are sourced.
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