Opal (rough and cut) Shoa Province, Ethiopia |
Serandite with Aegirine Mont St. Hilaire, Quebec, Canada |
Opal var. Hyalite San Luis Potosi, Mexico |
Olmiite on matrix N Chwanning II Mine, Kuruman, Republic of South Africa |
Corundum var. Sapphire Potanino Mine, Ilmen Mountains, Russia |
Diopside Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania |