20391 - Extremely Beautiful 5.88 Inch Brazilian Agate Slice (Chalcedony Geode Section) Prognathodon anceps Upper Cretaceous)

Upper Cretaceous)

The tooth is perfectly preserved

which is usually the only thing that is preserved

however this piece has a size slightly larger than the average

Reptilia - Squamata - Mosasauridae

20391 - Extremely Beautiful 5.88 Inch Brazilian Agate Slice (Chalcedony Geode Section) Prognathodon anceps Upper Cretaceous)Agate 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