green fluorite Rogeney quarry Weardale


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green fluorite specimen from Rogeney quarry Weardale

Mineral Group fluoride
Composition CaF2
Origin Rogeney quarry, Weardale
dimension (cm) 4.5x4x1.5
weight (g) 29
Rogeney quarry, Weardale was first discovered by collectors Lindsay Greenbank and Mike Sutcliffe in an abandoned 19th century limestone quarry during the early 1970’s, the Rogerley is to date the only mine operated on a commercial basis solely for specimen recovery in the UK. Operation of the mine was taken over by UK Mining Ventures in 1999.  see more on mindat
Fluorite is a colorful mineral, both in visible and ultraviolet light, and the stone has ornamental and lapidary uses. Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals. Optically clear transparent fluorite lenses have low dispersion, so lenses made from it exhibit less chromatic aberration, making them valuable in microscopes and telescopes. Fluorite optics are also usable in the far-ultraviolet range, where conventional glasses are too absorbent for use. see more at Wikipedia

Additional information

Weight 29 g
Dimensions 4.5 x 4 x 1.5 cm