Opal (polished) Jalisco, Mexico |
Tourmaline var. Uvite with Magnesite and Quartz Brumado, Bahia, Northeast Region, Brazil |
Olmiite on Calcite N Chwanning II Mine, Kuruman, Republic of South Africa |
Quartz var. Faden Dara Ismael Khan District, Waziristan, Pakistan |
Corundum var. Sapphire Potanino Mine, Ilmen Mountains, Russia |
Opal: Rough and Cut Shoa Province, Ethiopia |