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22209 Top Beautiful 3.56 Inch Calcite Crystal from South Morocco New Location Margaritopteris Impressive almost complete specimen with Impressive almost complete specimen with a very well developed fusion crust its specific identification presents an enormous complexity Huge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C and vaterite is even less stable
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