Twenty-six peridot samples from the Esquel pallasite meteorite and 27 samples from 10 terrestrial sources were studied by laser ablation–inductively coupled plasma–mass spectrometry (LAICP- MS). Among ...

Vivid blue, green, and purple-to-violet cuprian elbaites, renowned in the gem trade as “Paraíba” tourmalines, continue to be recovered in small amounts from northeastern Brazil. Since the initial ...

GIA Student Workrooms give you affordable access to all the equipment and gemstones you need to complete the practical requirements of your Gem Identification course through Online Education. This ...

GIA Student Workrooms give you affordable access to all the equipment and gemstones you need to complete the practical requirements of your Gem Identification course through Online Education. This ...

Twelve natural-color purple diamond crystals from Siberia, and seven round brilliants that were faceted from some of these crystals, were studied using spectroscopic methods to better understand their ...

GIAの学生用ワークルームでは、オンライン教育を通して学ぶ宝石鑑別コースの学生が実技必修科目を修めるために必要となるあらゆる装置や宝石を手軽に利用することができます。20個の石 ...

Figure 1. These emeralds from Musakashi, Zambia, range from 0.57 to 4.85 ct. The rough samples were polished with one window on each. The faceted sample measures 6.29 × 5.35 × 3.53 mm and weighs 0.97 ...

Through a unique combination of hands-on training, one-on-one coaching and multimedia, the Diamond Grading class explores how to grade diamonds consistently and accurately using a modern gem ...

ダイヤモンド グレーディング クラスでは、実践的なトレーニングと個人指導、マルチメディアを用いたGIA独自のプログラムにより、最新の宝石顕微鏡およびルーペを用いて、正確かつ一貫 ...

通过实习培训、一对一指导和多媒体教学相结合，钻石分级实习班探讨如何使用现代宝石显微镜和手持放大镜能一致和准确地进行钻石分级。学生将学习 GIA 国际钻石分级系统 (International Diamond ...

The Graduate Colored Stones diploma program explores more than 60 species of common and collector gemstones found in the marketplace. Subjects covered include the GIA Colored Stone Grading System, ...

鉴定种类繁多的宝石。根据品质、稀有性和颜色对其进行鉴定。学习最有效的宝石分级、购买和销售技巧。各种令人眼花缭乱的机会等待着那些了解有色宝石市场的人们去发掘。 构建关于有色 ...