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

SKU 9457625610
USD107.75 USD152.75
4.5

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Ledger sheet
Description

Halisaurus and prognatodon

palaeobiogeographic distribution and phylogenetic position

many of the spines during the preparation process have been fractured and glued again

Guaranteed by IMCA (International Meteorite Collectors Association) member 5681

SYSTEMATIC PALEONTOLOGY

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from South Morocco Basseiarges Halisaurus and prognatodonHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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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