Calcite/Galena

Calcite/Galena

This is a pretty little specimen of Calcite CaO3 and galena PbS  both of which are common hydrothermal minerals.  The Calcite crystals are  scalenahedral and well formed, but the galena which has grown between the calcite crystals, is very poorly formed. The specimen, which is only of interest because of it's visual appeal  is from the Madan ore field in Bulgaria.