Gypsum
Gypsum is a mineral with the chemical formula CaSO4·2H2O. It has a Mohs hardness of 2 and vitreous to silky luster.
Gypsum properties
| Type | Mineral |
|---|---|
| Chemical formula | CaSO4·2H2O |
| Mohs hardness | 2 |
| Luster | Vitreous to silky |
| Typical colors | Colorless, white, yellow, gray, red, blue, and green |
| Formation | Evaporite deposits formed from the evaporation of saline water |
| Rarity | 4 / 10 |
Mohs hardness 2 — very soft
1 · Talc5 · Apatite10 · Diamond
Mineralyst
Wondering what you found?
Point your camera at any mineral 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
