1月の誕生石であるガーネットは、様々な色のものがあるので最も多様な宝石の一つとして考えられています。ガーネットは、世界中で採鉱されており、数多くのポジティブな感情の象徴となっています。このユニークな誕生石について詳しく学んでみましょう。

Uses gamma-ray spectrometry to directly measure internal radioactivity in green nephrite from deposits in Poland, Russia, Canada, and New Zealand.

Aquamarine and heliodor are colored by Fe ions, an important coloring agent for beryl. Blue to yellow gem beryl was studied by quantitative spectroscopy and trace-element analytical techniques to ...

June 6-9, 2025 The Venetian Expo 201 Sands Ave Las Vegas, NV, 89169 Las Vegas, Nevada Industry-leading research, education and innovation have kept GIA on the cutting-edge of gemology since 1931, and ...

GIA 成立于 1931 年，是一家独立的非盈利机构，通过研究、教育和鉴定所服务来保护购买宝石和珠宝的大众。

CARLSBAD, Calif. – May 19, 2025 – GIA (Gemological Institute of America) is introducing an expanded approach to evaluating nacre on all pearl classification reports, providing an important update to ...

This course covers how to describe diamond jewelry accurately for effective and ethical sales conversations with customers. Key topics examined include the internationally accepted GIA clarity grading ...

Young students anywhere in the world can now experience the wonder of gems and minerals with GemKit™ by GemKids®, an online treasure trove of information and activities from GIA®, the Gemological ...

GemGenève-Geneva International Gem & Jewelry Show（ジュネーブ国際宝石&ジュエリーショー） 5月9日～11日 午前10時 ～午後6時30分 5月12日 午前10時 ～午後5時 ブース: K12 Palexpo（パレクスポ） Route Francois-Peyrot 30, 1218 Le スイス、ジュネーブ ...