Gypsum
Gypsum is a common calcium sulfate mineral. Gypsum occurs in both massive and crystalline forms. It has broad applications in drywall, plaster, chalk, and sculpting.
Uses
As a soft, white, powdery mineral, Gypsum has broad applications in drywall, chalk, and sculpting. It is the main component of plaster and wallboard.
Notable Localities
Gypsum is an abundant mineral found worldwide. Collectable quality specimens have been found in the Sahara Desert as "desert rosettes", and in the Sicily, Italy Sulfur Mines, as well as in Pernatty Lagoon, South Australia. Enormous crystals of Gypsum have been found in cave systems worldwide, with the most notable examples being "Cave of the Crystals" in Chihuahua, and the Mammoth Caves of Kentucky.
| Properties | |
|---|---|
| Chemical Formula | Ca(SO4) · 2H2O |
| Hardness | 2-2 |
| Crystal System | Monoclinic |
| Mineral Class | Sulfates |
| Luster | Vitreous, Sub-Vitreous, Silky, Pearly, Dull |