Rainbow Chalcopyrite On Calcite Crystals : Dneister River , Moldova 🇲🇩 4.8x9cm The product is a unique piece of Rainbow Chalcopyrite on Calcite Crystals from the Dneister River in Moldova. These natural crystals have a beautiful rainbow color and are formed on calcite crystals. The origin of these crystals is Bulgaria, adding to their geological interest and collectible value. This piece would be a valuable addition to any crystal or mineral specimen collection.