A little known fact is that fluorite was apparently mined as smelting flux, although there are no production figures (W. Phillips, ca. 1805).
Cubes and cubo-octahedrons
Quality of samples:
not specified / average specimens
Hogg, T. (1825): A Manual of Mineralogy. Polyblank Publishers (London), p. 131; Henwood, W.J. (1843): Transactions of the Royal Geological Society of Cornwall 5, 1-386; Hall, T.M. (1868): The Mineralogist's Directory. Edward Stanford (London), 168 pp.; Rocks & Minerals 17, 129