fluorite
Glassy, brittle halide mineral, calcium fluoride CaF2, forming cubes and octahedra; colourless when pure, otherwise violet, blue, yellow, brown, or green.
Fluorite is used as a flux in iron and steel making; colourless fluorite is used in the manufacture of microscope lenses. It is also used for the glaze on pottery, and as a source of fluorine in the manufacture of hydrofluoric acid.
Fluorite is used as a flux in iron and steel making; colourless fluorite is used in the manufacture of microscope lenses. It is also used for the glaze on pottery, and as a source of fluorine in the manufacture of hydrofluoric acid.
© RM 2012. Helicon Publishing is division of RM.
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