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水晶的外貌形态与产生(2)

作者:敏敏 点击:次 时间:2009-11-09 16:26

  正常的水晶在生长时,多可以发现和柱形尖端輘线平行的生长纹(growth lines)。由于在地底、岩洞中的生长空间多狭窄,尤其在遇到地震时,或地壳变动时,甚至容易遭到其他矿石的挤压,常常会压迫产生不同的「晶面」。还有,当水晶还是在液态状的时候,常常也会包覆着其他的矿石、泥灰一起结晶成长,如金红石(稍后变成发晶)、火山泥灰(稍后变成幻影水晶)等等。所有的这些,都是「自然的一部份」,请不要视为「瑕疵」。
  一.石英(monocrystalline quartz)
  
  白水晶(White Crystal)
  紫水晶(Amethyst)
  黄水晶(Citrine)
  茶晶(Smoky Quartz)
  粉晶(芙蓉晶Rose Quartz)
  乳白水晶(Milky Quartz)
  发晶(Rutilated Quartz)
  石英猫眼(Cats Eyes)
  红水晶 (Red Quartz)等. 
  二.隐晶石英(Cryptocrystalline quartz)
  
  结晶的形状非常细小,需要用显微镜才能看得清楚,外观上看起来是平滑、块状。常见最多的是各式玛瑙
  如条纹玛瑙(Stripped Agate)
  苔癣玛瑙(Moss Agate)
  蓝纹玛瑙(Blue Lace Agate)
  水玛瑙(Agate with Water)
  红玛瑙(Carnelian)等.

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