The collection consists of some 10 000 specimens of many different minerals. These include a fine collection of calcite; a large collection from the former Tsumeb Mines in Namibia; rhodeochrosite, which is found only at Hot as Hell near Oudtshoorn; about 250 fancy diamonds of many different shapes and colours; a unique meteorite collection, including both iron and stony (chondrites) meteorites; and a rare carbonaceous chondrite.