Alexandrite
Alexandrite is a gemstone with the chemical formula BeAl2O4. It has a Mohs hardness of 8.5 and vitrous to oily luster.
Alexandrite properties
| Type | Gemstone |
|---|---|
| Chemical formula | BeAl2O4 |
| Mohs hardness | 8.5 |
| Luster | Vitrous to oily |
| Typical colors | Color changes from green in daylight to red under incandescent light |
| Formation | Typically found in metamorphic rocks, formed through aluminum and beryllium-rich environments |
| Rarity | 9 / 10 |
Mohs hardness 8.5 — hard
1 · Talc5 · Apatite10 · Diamond
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