At first glace, this looks like a classic selenite rosette from the Red River Floodway, Manitoba, Canada. But no, guess again! This...

Tiffany stone is a complex rock composed of opalized fluorite with bands and veins of chalcedony, manganese oxide and bertrandite. The...

Brightly fluorescent crystal of fluorapatite from Cochabamba, Bolivia (possibly the Kami Mine). This specimen shows an unusual, bright,...