Minerals Systems Home Mineral Specimens at GRI Erythrite Azurite Rhodonite Amazonite Kyanite Bournonite Sulfur Barite Aegirine Realgar Selenite Staurolite Biotite Sphalerite Pyrite Fluorite Amethyst Dioptase Schorl Calcite Smoky Quartz Vanadinite Chalcopyrite Wulfenite Zircon Apophyllite
