calcite crystals, a mineral from the class of natural carbonates, one of the natural forms of calcium carbonate caco3

crystal calcite caco3 geology mineral calcium clear carbonate geological mineralogy mining rock texture specimen gemstone structure crystalline translucent gemmology luster formation transparent material gem natural gemology stone textured unpolished geochemistry reflection cube abstract sharp sparkling shiny background form rhombohedron rhomb acid growth earth science glassy piece rough close up