2005/06/11 | 蓝锥矿[Benitoite]
类别(℃〖化学〗) | 评论(0) | 阅读(30) | 发表于 16:36
The state gemstone of California. It consists of blue crystals of BaTiSi3O9 which form in amphiboles. It has high dispersion and is very sparkly. However, it is only found in San Benito County. It has a unique structure, consisting of rings of there silicate tetrahedra.
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