Sphalerite on Quartz Shuikoushan Lead/Zinc Mine, Chaling, Hunan Province, China |
Olmiite on Calcite N Chwanning II Mine, Kuruman, Republic of South Africa |
Spinel (rough and cut) Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) |
Danburite rough and cut San Luis Potosi, Mexico |
Tourmaline var. Uvite with Magnesite and Quartz Brumado, Bahia, Northeast Region, Brazil |
Diopside Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania |