アメトリンがこれほどまでに人気がある理由について学びましょう。

トルマリンは、実に多彩で魅力的な色合いを誇ります。実際、トルマリンはあらゆる宝石の中でも最も幅広い色域を持ち、ほぼすべての色合いの様々な濃淡が存在します。

The son of GIA's founder, Robert Shipley Jr. made significant breakthroughs in gem instrumentation.

カリフォルニア州カールズバッドにあるGIA本部で行われたGems & Gemology（宝石と宝石学）博物館の展示オープニングレセプションの様子。

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

This document provides the publication information for Gems & Gemology

A look at the

ヴァニア・レレスは2004年にロンドンのGIAでGGの資格を取得し、すぐにボンドストリートにあるグラフ・ダイヤモンド社に履歴書を送付し、念願の仕事に応募した。

A gemologist, educator, and self-described dreamer who established the Institute’s research department and founded the world-renowned International Gemological Symposium.

GIA’s global director of colored stone services raised the gemological bar in identifying gem materials and treatment processes.

GIA’s current distinguished research fellow has represented the Institute’s gemological excellence around the world for the past four decades.

This article highlights GIA's founder, Robert M. Shipley Sr.

化学的に純粋なベリルは無色ですが、微量元素によって緑、青、ピンク／赤の色になります。

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

GIA’s first female gemologist and a pioneer in the industry.

An update on the market presence of beryllium-treated blue sapphires and their identifying characteristics. Two large samples (22 and 53 ct) are also described.