A common mix of calcite, sphalerite, and willemite from the Sterling Mine, but with an unusual...
Calcite
SC1305 – Chalcedony & Calcite from Nebraska, USA
Calcite and chalcedony, fluorescent red and green under UV light, respectively. The calcite is...
SC357 – Calcite from Malmberget, Sweden
Small plate of compact calcite crystals. Zoned yellow/green fluorescence under shortwave UV light,...