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 玉石摆件
 

玉,在中国自古以来就有玉石王国的美名,它主要分两大类:硬玉和软玉。硬玉主要以翡翠为主,软玉分:岫玉、和田玉、清白玉、青海玉等等。

硬玉也称翡翠,属辉石类,单斜晶系、完全解理。主要组成物为矽酸铝钠(NaAlSi2O6,宝石矿中含有超过50%以上的矽酸铝钠才被视为翡翠),出产于高温低压下生成的变质岩层中。

软玉的化学成分是钙镁矽酸盐(Ca2Mg5(OH)2(Si4O11)2),单斜晶系。颜色由透闪石和阳起石的成份决定。真正属于矿物学上软玉的只有和田玉和透闪石质的岫岩玉。
 
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