Crystals of chalcopyrite, perched and in among siderite crystals, and topped with dolomite crystals dotted across the piece. The crystals of all three minerals are sharp. The chalcopyrite crystals are bright and lustrous - and there is a lot of chalcopyrite on this one. There is a bit of edge wear and some minor chipping in places, but many perfect crystals and a very nice piece. A beautiful combination of minerals on this specimen!