Sapphire
Sapphire is a gemstone with the chemical formula Al₂O₃ with trace elements. It has a Mohs hardness of 9 on Mohs scale and vitreous to slightly dulled luster.
Sapphire properties
| Type | Gemstone |
|---|---|
| Chemical formula | Al₂O₃ with trace elements |
| Mohs hardness | 9 on Mohs scale |
| Luster | Vitreous to slightly dulled |
| Typical colors | Blue, yellow, pink, green, and colorless; most commonly blue |
| Formation | Typically forms in metamorphic and igneous environments |
| Rarity | 7 / 10 |
Mohs hardness 9 — hard
1 · Talc5 · Apatite10 · Diamond
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