AMM269 Ammonite Fossil (South Dakota) Moldavite It shows a fibrous pattern

It shows a fibrous pattern in medium to very dark shades of blue and has chatoyancy

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(Width x Height) 33mm x 29mm

bowl: 7" x 5

AMM269 Ammonite Fossil (South Dakota) Moldavite It shows a fibrous patternThis 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