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石英类与石英岩类玉石是“玉石大家”的一族,虽然只差一字,却也不尽相同,石英类玉石成分主要是SiO_2,玉石品种有水晶、芙蓉石、玛瑙、碧玉、虎晶石等;石英岩类玉石其实是经区域变质或热力变质作用所形成的石英含量大于85%的变质岩,当其质量符合工艺美术要求时即称石英岩类玉石,如东陵石、密玉、贵翠、京白玉等。一、石英类玉石:此类玉石在地壳里分布非常广
Quartz and quartz rock jade is “jade everyone ” family, although only a word, but also different, quartz jade composition is mainly SiO2, jade varieties are crystal, hibiscus, agate, jasper, tiger Spar, etc. Quartzite jade is actually a metamorphic rock with a quartz content greater than 85% formed by regional metamorphism or thermal metamorphism. When its quality meets the requirements of arts and crafts, it is called quartz rock jade, such as Dongling Stone, Jade, expensive Tsui, Beijing white jade and so on. First, quartz jade: Such jade is widely distributed in the crust