Amethyst
Amethyst is a gemstone with the chemical formula SiO2. It has a Mohs hardness of 7 and vitreous luster.
Amethyst properties
| Type | Gemstone |
|---|---|
| Chemical formula | SiO2 |
| Mohs hardness | 7 |
| Luster | Vitreous |
| Typical colors | Purple to violet, sometimes with hints of blue or red |
| Formation | Formed in volcanic rocks and geodes from the cooling of silica-rich solutions |
| Rarity | 5 / 10 |
Mohs hardness 7 — hard
1 · Talc5 · Apatite10 · Diamond
Mineralyst
Wondering what you found?
Point your camera at any gemstone and Mineralyst identifies it in seconds — with guided follow-up questions for a confident answer.
- Build a collection
- Keep a wish list
- 5 photos per find
- Share with friends
