Diopside Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania |
Wulfenite Wulfenite from Villa Ahumada, Sierra de Los Lamentos, Chihuahua, Mexico |
Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Adamite on Limonite Ojuela Mine, Mapimi, Durango, Mexico |
Opal var. Hyalite San Luis Potosi, Mexico |
Spinel (rough and cut) Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) |