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09112 - Top Beautiful Huge 6.97 Inch Calcite Crystals from South Morocco - New Location Wulfenite Osteichthyes - Pycnodontiformes - Pycnodontidae

SKU 17209876538
USD242.75 USD272.75
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Description

Osteichthyes - Pycnodontiformes - Pycnodontidae

Mass: 2553 kg

PaleoDB taxon number: 85865

DeKay 1825 (eurypterid)

each consisting of about seven series of plates

09112 - Top Beautiful Huge 6.97 Inch Calcite Crystals from South Morocco - New Location Wulfenite Osteichthyes - Pycnodontiformes - PycnodontidaeHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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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