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Pakistan
Personne àcontacter Mr. ESHAL
Office 413, 4th Floor, Anum Estate, Shahra e Faisal, Karachi. Pakistan, Multan, Punjab
Calcium fluoride is a mineral composed of calcium fluoride (CaF2),
the principal fluorine-bearing mineral. It occurs as cubic,
isometric crystals and cleavable masses. When pure, it is colorless
and transparent, or translucent with a glassy luster. Impurities
cause color in the stone, and several varieties exhibit
fluorescence. Usually found either in pure veins or associated with
lead, silver, or zinc ores, it is common in limestone and
dolomites. Fluorite comes in a wide range of colors and has
subsequently been dubbed "the most colorful mineral in the world".
The most common colors are purple, blue, green, yellow, or
colorless. Less common are pink, red, white, brown, black, and
nearly every shade in between. Color zoning or banding is commonly
present. The color of the fluorite is determined by factors
including impurities, exposure to radiation, and the size of the
color centers.
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