20256 - Extremely Beautiful 4.77 Inch Brazilian Agate Slice (Chalcedony Geode Section) Tylosaurus sp however only a few claws

however only a few claws

This type of structure is only found in fossil excrements of piscivorous animals

Rouault 1847 (trilobite)

Dyrosaurus minor

20256 - Extremely Beautiful 4.77 Inch Brazilian Agate Slice (Chalcedony Geode Section) Tylosaurus sp however only a few clawsAgate 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