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寶石材料
Sapphire is a single crystal aluminum oxide (Al2O3). Its Mohs hardness is 9, it is one of the hardest materials. Sapphire has good mechanical strength, and it is also transparent from visible to IR sp..
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寶石窗片
Sapphire Windows are made from Sapphire material, which has transparent range from 180-4500nm. The refractive index is 1.755 at 1000nm. ..
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