Figure 1. A pinkish orange inclusion dominates the interior of this 20.58 ct unpolished topaz crystal from Pakistan. Photograph by Kevin Schumacher.
Figure 2. A combination of Raman and EDXRF analysis served to identify the inclusion as triplite. The inclusion is seen here using brightfield and fiberoptic illumination. Photomicrograph by Nathan Renfro; field of view 9.39 mm.
Fluorite and opaque inclusions in topaz.
Surface treatment with metallic oxides resulted in the unique look of this ring’s gem, marketed as mystic topaz. - Courtesy Livingstone Jewelry
リチャードP.ホーマー、GIA GGは、インペリアルトパーズカット彼の36.74カラットアンティーククッション凹面フォーカス™のために2013 AGTAスペクトラム賞を受賞しました。 写真：Robert Weldon、提供：オハイオ州ケKent（ケント）にあるGems By Design, Inc.（ジェムス・バイ・デザイン社）
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