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See Fluorite.

A name given to fluor spar in Derbyshire, where it is used for ornamental purposes.

Fluor spar. See Kand.

A variety of fluor spar, which, when heated, gives a beautiful emerald green light.

A massive variety of fluor spar, found in Derbyshire, England, and wrought into vases and other ornamental work.

stance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluorescent subst…

assive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.

Fluor spar; -- so called by Cornish miners.

A pseudomorphous crystal, as a crystal consisting of quartz, but having the cubic form of fluor spar, the fluor crystal having been changed to quartz by a process of substitution.

nonmetallic mineral, usually cleavable and somewhat lustrous; as, calc spar, or calcite, fluor spar, etc. It was especially used in the case of the gangue minerals of a metalliferous vein. Blue spar, Cube spar, etc. See under Blue, Cube, etc.

ineral or rock material which accompanies the ores in a vein, as quartz, calcite, barite, fluor spar, etc.; -- called also veinstuff.