Devilline on Malachite from Špania Dolina (Herrengrund), Banská Bystrica County, Slovakia

Devilline on Malachite from Špania Dolina (Herrengrund), Banská Bystrica County, Slovakia.

Fluorite from Weardale, County Durham, England

Fluorite from Weardale, County Durham, England

Barite from Cumbria, England

Barite from Cumbria, England

Cassiterite from Araca Mine, La Paz, Bolivia

Cassiterite from Araca Mine, La Paz, Bolivia

Azurite from Tsumeb Mine, Namibia

Azurite from Tsumeb Mine, Namibia

Apatite from Auburn, Androscoggin County, Maine

Apatite from Auburn, Androscoggin County, Maine

Pyromorphite from Old Wheatley Mine, Phoenixville, Pennsylvania

Pyromorphite from Old Wheatley Mine, Phoenixville, Pennsylvania

Adamite from Ojuela Mine, Mapimí, Durango, Mexico

Adamite from Ojuela Mine, Mapimí, Durango, Mexico

Variscite, Wardite, Crandallite, from Fairfield, Utah; gift of Arthur Montgomery

Variscite, Wardite, Crandallite, from Fairfield, Utah; gift of Arthur Montgomery