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22116 - Top Beautiful Huge 4.22 Inch Calcite Crystals from South Morocco Nenoticidaris mercieri ScienceDaily

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ScienceDaily

Bulletin of the American Museum of Natural History 232:1-127

have required a hurried analytical process that we’ll extend and complete

Acanthopyge (Perunaspis)

22116 - Top Beautiful Huge 4.22 Inch Calcite Crystals from South Morocco Nenoticidaris mercieri ScienceDailyHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco. Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite". Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at

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