05080 - Extremely Beautiful 3.66 Inch Brazilian Agate Slice (Chalcedony Geode Section) Pleuroceras Diagnosis: Very large mosasaurine mosasaur

Diagnosis: Very large mosasaurine mosasaur teeth bearing 1-2 prisms on the labial surface

The characteristic lines of suture of this cephalopod of the Paleozoic can be perfectly observed

Otarion filmeri

Richterarges

05080 - Extremely Beautiful 3.66 Inch Brazilian Agate Slice (Chalcedony Geode Section) Pleuroceras Diagnosis: Very large mosasaurine mosasaurAgate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz. It is characterized by its fineness of grain and variety of color. Although agates may be found in various kinds of host rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks. This beautiful large polished agate slices comes from southern Brazil. The stone has been soaked in a