Acanthite

Imiter, Atlas Mountains, Morocco

Diopside

Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania

Quartz, var. Herkimer Diamond

Ace of Diamonds Mine, Herkimer County, New York

Corundum Var. Sapphire

Balangoda, near Ratnapura, Sabaragamuwa Province, Sri Lanka

Spinel (rough and cut)

Mogok, Sagaing District, Mandalay Division, Burma (Myanmar)

Tourmaline var. Uvite with Magnesite and Quartz

Brumado, Bahia, Northeast Region, Brazil