Photo category: Rocks and Minerals specimen collection
- Photo taken Locality: Greece, Macedonia
- Photo taken by: Trichas, A.
- Photo taken date: October 2011
Photo of a sample of Calcite, bought in Halkidiki, Greece in 2000. It is colorless or white to white-yellow. The crystals are prismatic or rhombic and the luster is vitreous to dull. It is the main component of limestone and marbles as well as of stalactites/ stalagmites in caves. It has hardness of 3.