Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Tourmaline var. Uvite with Magnesite and Quartz Brumado, Bahia, Northeast Region, Brazil |
Opal var. Hyalite San Luis Potosi, Mexico |
Diopside Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania |
Quartz Var. Rose Lavra da Ilha Pegmatite, Taquaral, Itinga, Aracuai, Minas Gerais, Brazil |
Olmiite on matrix N Chwanning II Mine, Kuruman, Republic of South Africa |