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Metacanthian Trilibite from the Mid Devonian Period
highly variable Chalcedony spheres or roses are almost geode-like in appearance and one can clearly see the process of geode or agate formation in progress in each specimen
Originating from the famed Green River Formation in Wyoming
a crystal occurring in a wide variety of colors and forms
Barite is a mineral with an interesting history
Fluorite Mixed on Matrix Spessartine Metacanthian Trilibite from the MidFluorite 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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