mohs value 中文意思是什麼
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Tanzanite is a blue variety of the gemstone zoisite. it consists of calcium aluminium silicate and is not particularly hard, having a value of 6. 5 to 7 on the mohs scale
其實坦桑石則是寶石級藍色的黝簾石,是一種含鈣鋁的硅酸鹽,化學式為
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