Genuine Mosasaur Tooth with Root From Morocco (135.2 grams) elmwood Large cabinet specimen of jet

Large cabinet specimen of jet black sphalerite crystals in  compound groups of parallel crystals on matrix with quartz crystals

Lustrous transparent blue-gray bladed barite crystals in intersecting aggregates of subparallel crystals on geothite

5 x 3 x 3 inches

Grootfontein

Size: 8 x 2 x 4 inches

Genuine Mosasaur Tooth with Root From Morocco (135.2 grams) elmwood Large cabinet specimen of jetMosasaurs are an extinct group of large marine reptiles. Their first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764. Mosasaurs probably evolved from an extinct group of aquatic lizards known as aigialosaurs in the Early Cretaceous. During the last 20 million years of the Cretaceous period (Turonian Maastrichtian ages), with the extinction of the ichthyosaurs and decline of plesiosaurs, mosasaurs became the