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The historic Ouro Preto region of Minas Gerais, Brazil, is world-renown for the fine topazes that have been produced there for more than two centuries. Today, the Capao mine is one of the most productive in the region. This mine and the superb topazes produced there are described in the article by D. Sauer and colleagues in this issue. Marketed as "Imperial" topaz in the trade, the Ouro Preto topazes come in a broad range of hues, some of which are illustrated here. The fancy-cut topaz in the necklace weighs 24.13 ct; the three loose topazes weigh (from left to right) 44.11, 71.21, and 66.66 ct, respectively. Courtesy of Amsterdam Sauer Company, Brazil. Photo © Harold & Erica Van Pelt—Photographers, Los Angeles, CA. |
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