Calcite, (on Dolomite)

Mineral: Calcite, Dolomite
Chemistry: CaCO3
Size: 46 mm
Owner: Mariusz Oleszczuk
Photographer: Mariusz Oleszczuk

Stepped aggregates of colourless to creamish-white rhombohedral calcite crystals form a partial shell over a sub-spherical mass of pinkish-red dolomite. The the parallel, or closely sub-parallel, growth of the calcite crystals is notable.