Color Origin of Lavender Jadeite: An Alternative Approach
Natural Pearls from Australian Pinctada Maxima
Explores the fascinating history of natural pearling in Australian waters and examines the properties that might help distinguish these natural pearls from those that are accidentally produced during the culturing process.
Winter 2012 Gem News International
Turquoise from Zhushan County, Hubei Province, China
A relatively new source of gem-quality turquoise is hosted within slates in Zhushan County of China’s Hubei Province.
マダガスカルのDidy(ディディ)近郊のルビーおよびサファイアラッシュ
Spectral Characteristics of Natural-Color Saltwater Cultured Pearls from Pinctada Maxima
Natural-color saltwater cultured pearls (SWCPs) from Pinctada maxima were studied using UV-Vis-NIR and PL spectroscopy to better understand the mechanisms of their coloration and to separate them from other SWCPs with similar natural colors.
ベトナムの宝石:最新情報 (英語)
This article describes the major gem materials of Vietnam, together with their new finds and recent production.
Fall 2012 Gem News International
透明でファセットカットされたナノ多結晶合成ダイヤモンド
ダイヤモンド外観研究のための新ツール
L-Box™は、2つ以上のダイヤモンドの外観比較に使用されます。移動する物体の写真を捕捉するためにカメラが搭載されています。 画像は、高解像度又は3D映画制作のために組み合わせることができます。
Cultured Pearl Farming and Production in the Federated States of Micronesia
The current production of cultured pearls from the black-lipped pearl oyster (Pinctada margaritifera) in the Federated States of Micronesia includes mostly beaded as well as blister and nonbead-cultured pearls in a wide array of colors.
Summer 2012 Gem News International
ジェメシス社からのCVD合成ダイヤモンド (英語)
An examination of the gemological and spectroscopic properties of CVD synthetic diamonds from Gemesis Corp.
Precision Measurement of Inter-Facet Angles on Faceted Gems Using a Goniometer
A classic two-circle reflecting goniometer was used to measure inter-facet angles on five faceted diamonds that included round brilliants and fancy shapes.

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