Calcite, Pyrite from chenzhou, HuNan, China. Many smaller calcite on the large white calcite edges, which also be covered by pyrite, calcite are secondary crystalized, and pyrite covered on the first crystalized calcite crystals, interesting combination, also can view from backside, glass luster, and so clear veins on surface, so interesting piece. size:20×15.5×10cm, NO.20230203CP79.