AMM273 Ammonite Fossil (South Dakota) Field Guides showing semi-translucent bodycolor with a

showing semi-translucent bodycolor with a rainbow of color flash in red

polished cabochon features red

This is a polished specimen featuring pale pink and purple patterning with sagenite inclusions

and red agate banding in translucent agate with parallax

AMM273 Ammonite Fossil (South Dakota) Field Guides showing semi-translucent bodycolor with aThis 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 has a sharp ridge and smooth surface that displays very detailed suture patterns over the whole specimen. It has a mix of gray and brown shades, with some sections filled with white or yellow