Opal (polished) Jalisco, Mexico |
Opal (rough and cut) Shoa Province, Ethiopia |
Olmiite on matrix N Chwanning II Mine, Kuruman, Republic of South Africa |
Serandite with Aegirine Mont St. Hilaire, Quebec, Canada |
Opal: Rough and Cut Shoa Province, Ethiopia |
Danburite rough and cut San Luis Potosi, Mexico |