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天然玉石

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2022-11-23 14:27

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正确答案

指自然界产出的具有美丽、耐久、稀少性和工艺价值的矿物集合体及少数非晶质体（天然玻璃）统称为天然玉石。根据玉石材料和硬度、自然界产出量的多少以及工艺特点将玉石分为高档、中低档和雕刻石等几大类。

试题解析

标签：宝石学材料科学

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