Blue Sapphire Gemstone Information at AJS Gems

Blue Sapphire Gemstone Information at AJS Gems

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日期:2024-07-22
Most gems have a crystalline structure. Crystals have planes of symmetry and are divided into seven symmetry systems. The number of axes, their length, and their angle to each other determine the system to which a crystal belongs. The gem blue sapphire is...看更多