Acanthite

Imiter, Atlas Mountains, Morocco

Danburite rough and cut

San Luis Potosi, Mexico

Olmiite on Calcite

N Chwanning II Mine, Kuruman, Republic of South Africa

Corundum Var. Sapphire

Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka

Tourmaline Var. Elbaite

Kunar Province, Afganistan

Tourmaline var. Uvite with Magnesite and Quartz

Brumado, Bahia, Northeast Region, Brazil