Polychroism Obviously, a blue-green to blue. 7.5 hardness, density 2.68-2.80 grams / cubic centimeter.
明显,为蓝到蓝绿。硬度7.5,密度2.68-2.80克/立方厘。
Polychroism Obviously, a blue-green to blue. 7.5 hardness, density 2.68-2.80 grams / cubic centimeter.
明显,为蓝到蓝绿。硬度7.5,密度2.68-2.80克/立方厘。
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