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Natural copper is relatively soft and often found in intricate and unique structures
from the Cambrian age
Malachite has been mined for both use in copper tools and for ornamentation and jewelry
Species - Scyphocrinites elegans
but most specimens have vivid color due to various impurities and are often fluorescent
Fluorite Calcite Natural copper is relatively softFluorite 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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