Info: Dioptas is emerald-green mineral, with rhombohedral crystals. Dioptas is found mainly in groups of crystals, and only rarely in monocrystals. His low density and high fissure make him unfit for using in jewelry.
How to recognize: Dioptas can be dissolved easly in acids and in amoniac.
Found: Dioptas was found in Kazachstan, Kongo, Namibia, Chile, Argentina, Romania, Arizona (USA) and in Zambia and Peru.
Used for: Sometimes as ornamental stone.
Crystal structure |
Rhombohedral |
Hardness |
5 |
Color |
Emerald green |
Luster |
Glassy |