Fluorite optics are usable in the far-ultraviolet and mid-infrared ranges, where conventional glasses are too opaque for use.
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10 Facts About Fluorite
2.
Fluorite has four perfect cleavage planes that help produce octahedral fragments.
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3.
Fluorite can be found as a constituent of sedimentary rocks either as grains or as the cementing material in sandstone.
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4.
Fluorite noted an occurrence of "galena" or lead ore and fluoride of lime on the west side of St Lawrence harbour.
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6.
Fluorite is allochromatic, meaning that it can be tinted with elemental impurities.
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7.
Fluorite comes in a wide range of colors and has consequently been dubbed "the most colorful mineral in the world".
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8.
Fluorite is a major source of hydrogen fluoride, a commodity chemical used to produce a wide range of materials.
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9.
Fluorite elements are similarly paired with complementary "flint" elements .
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10.
Fluorite is normally colorless, but some varied forms found nearby look black, and are known as 'fetid fluorite' or antozonite.
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