07322 - Extremely Beautiful 4.31 Inch Brazilian Agate Slice (Chalcedony Geode Section) Spinosaurus Bones Grigoriev (2013) Redescription of Prognathodon

Grigoriev (2013) Redescription of Prognathodon lutugini (Squamata

United States (Nevada

This tooth does not have any type of restoration or repair

Great size

Fantastic and very rare teeth of this North African sauropod species

07322 - Extremely Beautiful 4.31 Inch Brazilian Agate Slice (Chalcedony Geode Section) Spinosaurus Bones Grigoriev (2013) Redescription of PrognathodonAgate 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