Calcite on Dolomite with Chalcopyrite - Sweetwater Mine, Missouri, USA
 
 Cluster with up to 5.4 cm long hexagonal prismatic calcites on dolomite with chalcopyrite. Characteristic for calcite from the Sweetwater Mine. This piece convinces with an asthetic build up and a golden yellow color.
 One of the crystals is double terminated. Perfect collector's piece!