1、
Less perfect forms, known as " boat " and " carbonado " are clusters of tiny crystals.
稍次些的则由细小的晶体群组成, 称为“圆粒钻石 ” 和 “ 黑钻石 ”.
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2、
Less perfect forms, known as" boart "and" carbonado", are clusters of tiny crystals.
稍次些的则由细小的晶体群组成，称为“圆粒钻石”和“黑钻石”。
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