Adamite on Limonite

Ojuela Mine, Mapimi, Durango, Mexico

Danburite rough and cut

San Luis Potosi, Mexico

Dioptase

Altyn-Tyube, Karagandy Oblast, Kazakhstan

Quartz, var. Herkimer Diamond

Ace of Diamonds Mine, Herkimer County, New York

Opal (rough and cut)

Shoa Province, Ethiopia

Spinel (rough and cut)

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