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中国兵器工业集团豫西集团中南钻石公司推出大颗粒“首饰用钻石”（也叫宝石级钻石），合...
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中国兵器工业集团豫西集团中南钻石公司推出大颗粒“首饰用钻石”（也叫宝石级钻石），合成出的克拉级Ⅱa型钻石，经中国地质大学珠宝检测中心检测，产品加工成饰品钻石后，颜色相当于天然钻石的D-E级，净度相当于天然钻石的VVS-SI级，实现了批量供应粒度最大、品级最优、色彩可控的克拉级培育钻石。
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