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Precious tooth of Eremiasaurus heterodontus (Mosasaur) from the phosphate deposits of the Ouled Abdoun Basin (Morocco)
Spectacular example of tooth belonging to an individual of Spinosaurus
†Acanthoceras sp
This partial maxillary was broken in some sectors during the initial collecting efforts but all parts were put back together
22196 - Calcite Geode with Gypsum Crystal 680 g in Natural Matrix Sphenopteris Precious tooth of Eremiasaurus heterodontusSIZE: 142. 6 mm 5. 61 in WEIGHT: 680 g 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 temperatures exceeding 300 C and vaterite is even less stable. Gypsum is a
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US$ 105.03