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Mineral Specimen #6702    Fluorite

Weardale, County Durham, England

22.7 x 16.5 x 7 cm
Largest crystal is 3.5 cm on longest edge
8.9 x 6.5 x 2.8 in

$750      Click here to order this mineral.                                                                                                                                                              

circa 1894, Ex. Chicago Field Museum, Ex. Dave Crawford


A large museum sized Fluorite specimen from a noted museum. The cubic Fluorite crystals are purple in color with lighter colored interiors due to the presence of micro Quartz. Under LW UV, the Fluorite fluoresces a vivid violet color. This is of some significance because in 1852, George Gabriel Stokes wrote in a paper "I am almost inclined to coin a word, and call the appearance fluorescence, from fluor-spar [i.e., fluorite], as the analogous term opalescence is derived from the name of a mineral." The Fluorite in which he had observed the phenomena is said to have been from Weadale.

Condition: Fairly Good

Flaws: Several of the largest crystals are cleaved on the corners. This not readily apparent because the specimen has apparently been lightly oiled which not only masks the damage but also increases the luster and clarity of the crystals. This is an all too common practice with Fluorite specimens. It appears all specimens currently coming Weardale and from China have been oiled as well as many that were mined in the past in Illinois.

This mineral is also found in the following galleries: Minerals From Europe | Fluorite | Fluorescents | Minerals Priced 500 Dollars and Greater

This mineral is also found in the following galleries: Minerals From Europe | Fluorite | Fluorescents | Minerals Priced 500 Dollars and Greater