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Amethyst is a form of Quartz which gets its beautiful purple tint from the substitution of silicone for iron due to irradiation
Metacanthian Trilibite from the Mid Devonian Period
which means it naturally occurs in its metallic form
where early very productive copper mines supplied much of the ancient world with the material
Amethyst has been sought after since ancient times as a gemstone and decorative object
Crinoid Plate Quartz Amethyst is a form ofSpecies Scyphocrinites elegans, from the Upper Silurian age. Approx 420 million years old.
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