Calcite, (on Dolomite)

Mineral: Calcite, Dolomite
Chemistry: CaCO3
Size: 83 mm
Owner: Mariusz Oleszczuk
Photographer: Mariusz Oleszczuk

Translucent white rhombs of calcite (to 14 mm; EDS confirmed) over pink cobalt-bearing dolomite crystals (EDS confirmed).  The pink dolomite is in turn crystallised over a layer of brown ferroan dolomite (EDS confirmed).   

The specimen was formerly in the collection of Jim Robison (USA).