Spinel
Spinel is a gemstone with the chemical formula MgAl2O4. It has a Mohs hardness of 7.5 - 8 and vitreous to sub-adamantine luster.
Spinel properties
| Type | Gemstone |
|---|---|
| Chemical formula | MgAl2O4 |
| Mohs hardness | 7.5 - 8 |
| Luster | Vitreous to sub-adamantine |
| Typical colors | Red, blue, green, black, pink, yellow, and colorless |
| Formation | Igneous and metamorphic rocks, commonly found in hydrothermal veins |
| Rarity | 7 / 10 |
Mohs hardness 7.5–8 — hard
1 · Talc5 · Apatite10 · Diamond
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