Opal (rough and cut) Shoa Province, Ethiopia |
Sphalerite on Quartz Shuikoushan Lead/Zinc Mine, Chaling, Hunan Province, China |
Adamite on Limonite Ojuela Mine, Mapimi, Durango, Mexico |
Opal: Rough and Cut Shoa Province, Ethiopia |
Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Tourmaline var. Uvite with Magnesite and Quartz Brumado, Bahia, Northeast Region, Brazil |