07634 - Pink Cobaltoan Calcite Crystals on Matrix - Bou Azzer Mine (South Morocco) Edrioasteroids most of the last published

most of the last published studies refer to other nomenclature in the description of the units and formations of the Lower and Upper Cretaceous

Mid-posterior teeth bulbous

Impressive and rare authentic example of Spinosaurus caudal (tail) vertebra bone

The enormous neural spines of his vertebrae in this sector indicate the enormous and robust back he had

07634 - Pink Cobaltoan Calcite Crystals on Matrix - Bou Azzer Mine (South Morocco) Edrioasteroids most of the last publishedCalcite 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". The Cobaltoan calcite is a variety of calcite containing Co2+ replacing Ca, that's the reason for its pretty pink color.