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卡塔尔世界杯雷竞技电竞入口知识
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宝石矿物鉴赏知识

现在已知的天然宝石有100多种。其中,商业宝石只有70多种(包括变种宝石)。迄今已发现的3000~3500种矿物中,宝石矿物有230多种,约占矿物总数的7%。
        宝石是在颜色、光泽、透明度、硬度和重量等方面达到一定工艺要求的矿物;而玉石则是达到质地细腻、光泽滋润、透明度好(水头足)、无杂质、污点和裂纹(无暇和柳)、块度大(块头大)、颜色纯正等工艺要求的矿物集合体。这就是人们常说的“石之美者为玉”。

文章来源(中国玉器人网:http://www.yuqiren.com ) 

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                                                                                       中国地质博物馆
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                                                                                       精品卡塔尔世界杯raybet雷竞技网址毛坯
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                                                                                       巴林鸡血石夕阳红-鸡血王
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                                                                                        昌化鸡血石多彩红
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                                                                                       青田石-封门蓝星冻
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                                                                                       田黄石1
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                                                                                        岫玉-花玉摆件-世外桃源
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                                                                                        岫岩玉手镯
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                                                                                       紫红色宝石的剖面
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                                                                                        墨翠扳指
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                                                                                       鱼化石
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