Adamite on Limonite

Ojuela Mine, Mapimi, Durango, Mexico

Danburite rough and cut

San Luis Potosi, Mexico

Olmiite on matrix

N Chwanning II Mine, Kuruman, Republic of South Africa

Opal (polished)

Jalisco, Mexico

Corundum Var. Sapphire

Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka

Smithsonite

Tsumeb Mine, Tsumeb, Namibia