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Notable deposits are found in various regions worldwide
It is polymorphic (same chemical formula but different crystal structure) with calcite and Vaterite and is likely to turn into calcite over geological time even under normal conditions
Description: Highly aesthetic
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Amethyst Druse | Brasilien Ichthyosaurus Notable deposits are found inOrigin: Brazil Size: H38. 5cm W30cm D28cm Weight: 34. 3 kg Description: An amethyst geode with a hollow, concave shape, with gradients of dark purple amethyst. Additional Information: Amethyst is a transparent, coarse grained variety of the silica mineral quartz, prized for its purple color. Its physical properties are similar to those of quartz, but it contains more iron oxide than any other type of quartz, and experts believe its color comes from
