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一克拉钻石直径是多少
更新时间: 2020-11-03 00:00:00  

一克拉钻石直径是6.5mm。1克拉约为0.2克,相当于一枚回形针的重量。钻石是指经过琢磨的金刚石,是贵重的宝石。也指硬度较高的人造宝石,可用来做精密仪器、仪表的轴承或装饰品。

关键词: 克拉 钻石 直径 多少

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