Opal (rough and cut) Shoa Province, Ethiopia |
Opal (polished) Jalisco, Mexico |
Opal: Rough and Cut Shoa Province, Ethiopia |
Olmiite on Calcite N Chwanning II Mine, Kuruman, Republic of South Africa |
Corundum Var. Sapphire Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka |
Dioptase Altyn-Tyube, Karagandy Oblast, Kazakhstan |