名词中文翻译1
中文翻译：Unknown
同义词：
['high-qualitydiamond', 'high-grade diamond']
例句：
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1. The gem grade diamond isthe most valuable type of diamond.
宝石级钻石是最有价值的钻石类型。
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2. Thisgem grade diamond was cutby a master jeweler.
这块宝石级钻石是由一位大师珠宝商切割的。
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3. The gem grade diamond isoften used in jewelry and decorative items.
宝石级钻石常用于珠宝和装饰品中。