Dinosaur Bone 2 Cabochon is hand-cut and polished

Cabochon is hand-cut and polished

Some bone was used from the collection of Robert and Louise Green estate

The Jurassic period was the middle of three periods

silt or mud

Dinosaur Bone 2 Cabochon is hand-cut and polishedDinosaurs emerged between 240 million and 230 million years ago. They existed until about 66 million years ago when a giant asteroid slammed into the earth in the Yucatn Peninsula in Mexico. Dinosaurs first appeared in the Triassic period (251. 9 ma to 201. 3 ma); they roamed the supercontinent of Pangaea. But by the time the asteroid hit at the end of the Cretaceous period (145 ma to 65 ma) the continents were in approximately the same place they are