Acanthite

Imiter, Atlas Mountains, Morocco

Datolite with Quartz

Dalnegorsk, Primorskij Kraj, Russia

Olmiite on Calcite

N Chwanning II Mine, Kuruman, Republic of South Africa

Opal (rough and cut)

Shoa Province, Ethiopia

Smithsonite

Tsumeb Mine, Tsumeb, Namibia

Zoisite Var. Tanzanite

Merelani Mine, Lelatema Mountains, Arusha Region, Tanzania