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Natural copper is relatively soft and often found in intricate and unique structures
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
from the Cambrian age
but most specimens have vivid color due to various impurities and are often fluorescent
Trilobite Geodes Garnet Natural copper is relatively softFlexycalymene Trilobite Geodes are approx. 521 million years old.
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