Crystallization of Barite Crystal and Fluorcalcioromeite…

Botroidal goethite with metallic from Tharsis mines…

Large, translucent SCHEELITE crystal with a contact twin. The largest face is 1.4 inches long. Brilliant golden-yellow color. It fluoresces blue under short wave UV light. The matrix is silvery MUSCOVITE. The specimen is from the famous Pingwu mine in China. Scheelite is a major ore for Tungsten. This specimen is from the collection of Roger Maynard. Roger is a friend and was a long-time geologist with the US Geological Survey.

Vitreous black TOURMALINE from the Harney Peak Pegmatite of South Dakota.