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with uses in various industries including oil drilling
many of which feature coatings of fine
This naturally occurring form of relatively common pyrite remains highly sought after by collectors as a specimen or for use as a gem or in jewelry
narrow shape resembling the interior and pitched roof of a cathedral
where some truly impressive specimens like this very rarely emerge from the mines
Fluorite Tanzanite with uses in various industriesFluorite 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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