07311 - Extremely Beautiful 3.79 Inch Brazilian Agate Slice (Chalcedony Geode Section) Onchopristis Teeth Impressive and huge vertebra of

Impressive and huge vertebra of this shark species

Late Cretaceous

Semi-quantitative EDS X-ray microanalysis was performed using EDS spot analysis with acquisition time 60s and maximum process time to achieve best resolu¬tion of peaks in spectra

and a large

ptesoraurs and sauropod dinosaurs

07311 - Extremely Beautiful 3.79 Inch Brazilian Agate Slice (Chalcedony Geode Section) Onchopristis Teeth Impressive and huge vertebra ofAgate 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