Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Wulfenite Wulfenite from Villa Ahumada, Sierra de Los Lamentos, Chihuahua, Mexico |
Opal (rough and cut) Shoa Province, Ethiopia |
Opal (polished) Jalisco, Mexico |
Adamite on Limonite Ojuela Mine, Mapimi, Durango, Mexico |
Sphalerite on Quartz Shuikoushan Lead/Zinc Mine, Chaling, Hunan Province, China |