Tuesday, August 24, 2010

⤱ Dolomite, Arsenopyrite ⤱

Dolomite is a magnesium-bearing carbonate mineral, formula CaMg(CO3)2, and often occurs as saddle-shaped crystals. Arsenopyrite is an iron arsenic sulphide mineral that occurs as silver crystals. It's formula is FeAsS.

This specimen has spherical aggregates of dolomite crystals with well-formed arsenopyrite crystals from the Renison Mine, Tasmania.