22209 - Top Beautiful 3.56 Inch Calcite Crystal from South Morocco - New Location KemKem_Crocodile_Species Sigillariaceae

Sigillariaceae

Fe/Mn=52±2

The age of these correspond to the Maastrichtian stage

Great size

referring to the arid climate in present day Morocco where this marine reptile was recovered

22209 - Top Beautiful 3.56 Inch Calcite Crystal from South Morocco - New Location KemKem_Crocodile_Species SigillariaceaeHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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