20800 - Top Beautiful Huge 5.61 Inch Calcite Crystals from South Morocco - New Location Kettneraspis 26 Inch = 6

26 Inch = 6

this is a magnificent acquisition for any collection

Since the first study of Moroccan fossil turtles

Sister taxa: Pharostoma

generally the teeth in Morocco are very dark braun

20800 - Top Beautiful Huge 5.61 Inch Calcite Crystals from South Morocco - New Location Kettneraspis 26 Inch = 6Huge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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