AMM270 Ammonite Fossil (South Dakota) Polished Pebbles Bruneau jasper polished slab from

Bruneau jasper polished slab from Idaho

and blue-gray jasper

you can cut without any problems for years

This large polished slab features shades of tan and earthy green jasper with red and black detailing

AMM270 Ammonite Fossil (South Dakota) Polished Pebbles Bruneau jasper polished slab fromThis ammonite specimen comes from South Dakota in the Cretaceous period when the area was submerged by the Western Interior Seaway millions of years ago. They are typically preserved in hard concretions that must be carefully removed. This sizeable fossil shows leafy suture patterns and outer ridges in pale yellow calcite and shades of tan and brown. 4" x 3" 6oz (172g) Ammonites are prehistoric nautilus related to the modern day nautilus, squid, and