Mines: Fluorite Mines Show Caves
2021-3-5 · Fluorite Mines Blue John, a blue variety of fluorite is found in Treak Cliff Cavern & Mine and other caves around Castleton. Fluorite (CaF 2) or fluorspar is a halide mineral composed of calcium and fluor. It is found in various different colours including colorless, white, purple, blue, green, yellow, orange, red, pink, brown, and bluish black.
Read More