20384 - Extremely Beautiful 6.34 Inch Brazilian Agate Slice (Chalcedony Geode Section) Cleoniceras Normally it is the species

Normally it is the species Otodus obliquus

Stephanodus sp : Fossilworks (Paleobiology Database)

Acanthopyge (Perunaspis)

Borealaspis

Full reference: B

20384 - Extremely Beautiful 6.34 Inch Brazilian Agate Slice (Chalcedony Geode Section) Cleoniceras Normally it is the speciesAgate 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