AMM269 Ammonite Fossil (South Dakota) Tourmaline and green Royal Imperial Jasper

and green Royal Imperial Jasper specimens with multi-colored egg patterning

27mm x 34mm

9oz together

It shows translucent yellow to white concentric banding

and black in color

AMM269 Ammonite Fossil (South Dakota) Tourmaline and green Royal Imperial JasperThis 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 complex leafy suture patterns in light and dark brown, some filled with pale yellow calcite. Some sections of pearly shell remain that show strong rainbow iridescence. 4. 75" x 3. 5" 10. 8oz