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2.3" Red Ruby Spinel Egg in Biotite Matrix Natural Sparkling Mineral Stone India
- Item No : 326138492619
- Condition : New
- Brand : No brand Info
- Seller : hqrp-crystal
- Current Bid : US $20.76
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* Item Description
- Probably the most familiar minerals that have the spinel crystal structure are the ore minerals magnetite and chromite, neither of which is a gem material. Gem spinel is usually quite close in composition to Mg, Al spinel but contains small amounts of Fe, Zn, and Cr that act as chromophores and account for the wide range of possible colors.
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