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Cyphaspis is a genus of small trilobite that lived from the Late Ordovician to the Late Devonian
Tissint 29°28
It does not have any type of restoration or repair
many of the spines during the preparation process have been fractured and glued again
09133 - Top Beautiful Huge 7.80 Inch Calcite Crystals from South Morocco Basseiarges Cyphaspis is a genus ofHuge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco.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
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