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The spectacular display of colors these specimens display can be formed by two different geological processes: the oxidation of pyrite causing ultra-thin layers of iron oxide to form on the surface
The herring-like fish of the genus Knightia were far and away the most abundant freshwater fish during this era
in iron smelting and other metallurgy
The “Benz” part of the name comes from the tip of some calcite crystals which have a clearly defined three-pointed star of pyrite
but most specimens have vivid color due to various impurities and are often fluorescent
Red Octahedral Fluorite Barite The spectacular display of colors
