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[GB/T 18303-2008] 钻石色级目视评价方法[现行]
发布时间：2008-05-26
实施时间：2008-11-01
本标准是对ＧＢ／Ｔ１８３０３—２００１《钻石色级比色目视评价方法》的修订。本标准规定了采用目视评价方..
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[GB/T 18303-2001] 钻石色级比色目视评价方法[已作废]
发布时间：2001-01-21
实施时间：2001-05-01
本标准规定了采用目视评价方法对钻石（已切磨）颜色（Cape系列）进行分级的基本要求和操作规程。本标准..
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发布时间：1996-10-07
实施时间：1997-05-01
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[DZ/T 0100-1994] 天然冰洲石技术要求[已作废]
发布时间：1994-06-08
实施时间：1994-06-08
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发布时间：1989-03-01
实施时间：1989-03-01
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发布时间：1989-03-01
实施时间：1989-03-01
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发布时间：1989-03-01
实施时间：1989-03-01
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[JC 220-1979(1996)] 天然金刚石[已废止]
发布时间：1900-01-01
实施时间：
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