Tanzanite
Tanzanite is a gemstone with the chemical formula Ca2Al3(SiO4)(Si2O7)O(OH). It has a Mohs hardness of 6-7 on Mohs scale and vitreous luster.
Tanzanite properties
| Type | Gemstone |
|---|---|
| Chemical formula | Ca2Al3(SiO4)(Si2O7)O(OH) |
| Mohs hardness | 6-7 on Mohs scale |
| Luster | Vitreous |
| Typical colors | Blue to violet, sometimes with a pleochroic effect showing burgundy and greenish hues |
| Formation | Found in metamorphic rocks, formed under high pressure and temperature conditions |
| Rarity | 8 / 10 |
Mohs hardness 6–7 — hard
1 · Talc5 · Apatite10 · Diamond
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