AMM271 Ammonite Fossil (South Dakota) Collector where to look for them

where to look for them

Its name come from the Latin for seawater and it was said to keep sailors safe at sea

33mm x 33mm

4cm x 12cm polished face

and are often referred to as “composite cabochons

AMM271 Ammonite Fossil (South Dakota) Collector where to look for themThis 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 mixes of brown and yellow calcite with a smooth surface displaying complex leafy suture patterns. It has a fairly well preserved chamber opening and spots of red, yellow, and green iridescence.