22196 - Calcite Geode with Gypsum Crystal 680 g in Natural Matrix Sphenopteris Unique plate handmade in the

Unique plate handmade in the south of morocco

Meitanillaenus

This partial maxillary was broken in some sectors during the initial collecting efforts but all parts were put back together

Petrography: The meteorite displays a fine-grained

†Acanthoceras sp

22196 - Calcite Geode with Gypsum Crystal 680 g in Natural Matrix Sphenopteris Unique plate handmade in theSIZE: 142. 6 mm 5. 61 in WEIGHT: 680 g 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 temperatures exceeding 300 C and vaterite is even less stable. Gypsum is a