Opal var. Hyalite San Luis Potosi, Mexico |
Corundum var. Sapphire Potanino Mine, Ilmen Mountains, Russia |
Diopside Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania |
Quartz, var. Herkimer Diamond Ace of Diamonds Mine, Herkimer County, New York |
Tourmaline Var. Elbaite Kunar Province, Afganistan |
Spinel (rough and cut) Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) |