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宝石辞典
title

Name of mineral : Tourmaline
Mohs hardness : 7~71/2
Refractive index : 1.624~1.644
Specific gravity : 3.06


Untreated
Gem Quality
Size (mm) : L 18.0 × W 10.7 × D 8.36
Weight : 14.45 ct
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