Wulfenite Wulfenite from Villa Ahumada, Sierra de Los Lamentos, Chihuahua, Mexico |
Zoisite Var. Tanzanite Arusha, Merelani, Tanzania |
Adamite on Limonite Ojuela Mine, Mapimi, Durango, Mexico |
Opal (polished) Jalisco, Mexico |
Spinel (rough and cut) Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) |
Corundum var. Sapphire Potanino Mine, Ilmen Mountains, Russia |