Spinel
gem · uncommon
Quick facts
- Formula
- MgAl2O4
- Hardness
- 7.5-8
- Luster
- Vitreous
- Colors
- Red, pink, blue, purple, black
Spinel is a hard, glassy mineral that occurs in a variety of colors. It is often used as a gemstone and can be confused with other red gems like ruby and garnet.
Look for a vitreous luster, lack of cleavage, and a range of colors, often red or blue.
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