22116 - Top Beautiful Huge 4.22 Inch Calcite Crystals from South Morocco Nenoticidaris mercieri Impressive and rare authentic example

Impressive and rare authentic example of unidentified theropod dinosaur toe foot claw

alternating with microgranular quartz

was around 2

This specimen has a fresh cut to see its internal texture

Ceratocephalinae

22116 - Top Beautiful Huge 4.22 Inch Calcite Crystals from South Morocco Nenoticidaris mercieri Impressive and rare authentic exampleHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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