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GIA发现覆合钻石
Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.
GIA发现覆合钻石
Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.
春天的 2017年拍卖更新: 有史以来最昂贵的宝石和其他记录
The spring 2017 auction season saw two important price records fall and solid, if not rising, prices for top gems across the board.
历史读物:阿肯色州钻石
历史读物清单:The Diamond Fields of South Africa(《南非钻石矿场》):第 1 部分 (1868-1893)
1867 年初,南非钻石的发现标志着钻石探索历史时期的开始。

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