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09133 - Top Beautiful Huge 7.80 Inch Calcite Crystals from South Morocco Basseiarges Halisaurus and prognatodon

USD107.75 USD142.75
SKU 9457625610
4.5

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Description

Halisaurus and prognatodon

palaeobiogeographic distribution and phylogenetic position

Guaranteed by IMCA (International Meteorite Collectors Association) member 5681

Carroll 1988

09133 - Top Beautiful Huge 7.80 Inch Calcite Crystals from South Morocco Basseiarges Halisaurus and prognatodonHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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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