Natural manganese mineral crystal specimens collection

Rhycomanganite is a carbonate mineral, which often contains iron, calcium, zinc and other elements. And these elements often replace manganese. Therefore, pure rhomanganese ore is rare. Diamond manganese is also the source of manganese for the production of ferromanganese alloys. They are usually granular, lumpy or kidney-shaped, red, and the surface is brownish-black after oxidation. It has a glass luster. Those with large grains and transparent colors can be made into gems. Small and translucent aggregates can be used as jade carving materials.