Photo category: Rocks and Minerals specimen collection
Rocks and Minerals specimen collection
- Photo taken Locality: Brazil
- Photo taken by: Trichas, A.
- Photo taken date: March 2013
Photo of an Amethyst geoid with violet or purple color. A variant of the mineral quartz used for decorative purposes as a gemstone. It has a vitreous luster and chemical composition of silicabioxide. Hardness 7.