AMM270 Ammonite Fossil (South Dakota) Polished Pebbles This specimen contains gold

This specimen contains gold

Each one is unique and is slightly different in shape

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

and red-ish plumes in translucent agate

and blue-gray jasper

AMM270 Ammonite Fossil (South Dakota) Polished Pebbles This specimen contains goldThis 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