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金云仙珠宝课堂

珍珠、翡翠、玉石、宝石、碧玺、琥珀、珊瑚

金云仙珠宝课堂:珍珠的历史

作者:珠宝达人 点击:次 时间:2010-01-28 16:45

  我国是世界上采捕、利用、培育、生产淡水珍珠最早的国家之一。早在春秋时代,《书经》中就有关于珍珠的记载,并有《天工开物》采珠全图的记录。我国早在4000年前就在淮河流域采捕天然珍珠作为贡品,还从古墓中发现把珍珠作为装饰品随葬的。到了明朝便发明了淡水珍珠养殖法。

  珍珠是贝类外套膜的一部分细胞由于某种原因在贝体内形成珍珠囊分泌类似贝壳的物质,围绕一个共同的核心沉积而成的圆球形或其他形状的物体。珍珠既晶莹夺目,又清凉含蓄,是唯一由生物造就的宝石

  一般来说,珍珠的化学成分为:碳酸钙91.5%、水3.97%、有机物3.83%、其他物质0.70%。珍珠内的无机成分主要是钙与各种盐类,有机物成分主要为含有多种氨基酸的硬蛋白类的壳角蛋白。

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