William Severance

Epidote, Quartz, Calcite

Fluorite

Calcite, Fluorite

Fluorite, Calcite

Silver, Copper

Calcite on Copper; Complex Calcite twin over Calcite phantom on Copper

Calcite on Copper; Calcite twin over Calcite phantom on Copper

Calcite on Copper; Calcite twin over Calcite phantom on Copper

Copper

Fluorapophyllite on arborescent Copper

Silver

Copper

Fluorite

Rhodochrosite, Tetrahedrite

Wulfenite

Siderite, Quartz

Malachite

Calcite

Amethyst

Azurite

Azurite

Smithsonite (Cobalt-rich)

Malachite pseudomorph after Azurite

Cerussite, Cuprite, Calcite, Malachite

Dioptase on Calcite