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or the formation of equally thin layers of secondary minerals due to hydrothermal or other alteration
fluorite specimens have been prized since ancient times and are now among the most popular minerals in the collecting world
Azurite has been sought after since ancient times as a gem and for use in blue pigment
Each specimen is expertly prepared
and blues as well as the more commonly encountered clear or pale white
Fluorite Opal or the formation of equallyFluorite is one of the most variable of all crystalline minerals, occurring in shades of blue, green, purple, red and many other colors corresponding to their physical makeup and conditions when the mineral was formed. The name fluorite comes from its use as a flux, or chemical cleaning agent, in iron smelting and other metallurgy. Pure fluorite is clear, but most specimens have vivid color due to various impurities and are often fluorescent. With a
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