Acanthite

Imiter, Atlas Mountains, Morocco

Danburite rough and cut

San Luis Potosi, Mexico

Quartz, var. Herkimer Diamond

Ace of Diamonds Mine, Herkimer County, New York

Opal (polished)

Jalisco, Mexico

Corundum Var. Sapphire

Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka

Zoisite Var. Tanzanite

Arusha, Merelani, Tanzania