Fluorite cubic crystals

Fluorite cubic crystals

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Fluorite cubic crystals, close-up. Also known as fluorspar, this mineral is composed of calcium fluoride (CaF2). This is a cubic, or isometric, mineral, though octahedral and more complex isometric forms also occur. Fluorite is used in the making of opalescent glass, enamels, cooking utensils, hydrofluoric acid, and as a flux material in the smelting of iron. The mineral gave its name to the property fluorescence, as impurities cause many samples to fluoresce strongly in UV (ultra-violet) light.

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Keywords: caf2, calcium fluoride, close-up, crystal, crystals, cubic, detail, earth science, floresce, fluor-spar, fluorescence, fluorite, fluorspar, flux, geological, geology, habit, isometric, material, mauve, mineral, mineralogy, purple, soft, stone

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