Corundum var. Sapphire Potanino Mine, Ilmen Mountains, Russia |
Sphalerite on Quartz Shuikoushan Lead/Zinc Mine, Chaling, Hunan Province, China |
Opal (polished) Jalisco, Mexico |
Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Tourmaline var. Uvite with Magnesite and Quartz Brumado, Bahia, Northeast Region, Brazil |
Beryl var. Aquamarine (etched) Itatia Mine, Minas Gerais, Brazil |