Lot 729
Large Complete Ammonite with Flashes of Iridescence. This large complete 9½ x 7" ammonite of the Placenticeras species has flashes of bright reddish-orange iridescence preserved on its original mother of pearl shell. When cut, this colorful part of the ammonite shell is used in jewelry and is known officially as ammolite, a registered gemstone. This remarkable ammonite, preserved in a bowling ball type concretion, is from the 75-million-year-old Pierre Shale of South Dakota, when South Dakota was part of the large inland sea. This complete ammonite is still partially contained within part of the concretion which serves as a natural display stand. Estimate Value $600 - 700
|
| |
| Unsold |
