RARE Marble Ammonite Fossil Specimen from Russia Extraordinary Black Onyx NR!

Pricing & History

Sold for
Start Free Trial or Sign In to see what it's worth.
Sold Date
Source eBay

Hi there. I am selling this really amazing and super rare marble ammonite fossil. I bought them at a gem show in Arizona and it was found in Russia . LOOK BELOW FOR MANY LARGE PHOTOS Until I found these little guys, I had never seen anything like them before!Basically fossils are just the animals that have been replaced by rock. I hope it finds a good home out there. The fossil measures 11 mm by 9 mm by 5 mm. It weighs 3.33 carats, or 0.67 grams. Have fun bidding, thanks for visiting my auction and have a nice day!Here is some information about the fossils from Wikipedia. Enjoy, and . Ammonites are an extinct group of marine animals of the subclass Ammonoidea in the class Cephalopoda, phylum Mollusca. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods. Ammonites' closest living relative is probably not the modern Nautilus (which they outwardly resemble), but rather the subclass Coleoidea (octopus, squid, and cuttlefish). Their fossil shells usually take the form of planispirals, although there were some helically-spiraled and non-spiraled forms (known as "heteromorphs"). Their name came from their spiral shape as their fossilized shells somewhat resemble tightly-coiled rams' horns. Plinius the Elder (died 79 A.D. near Pompeii) called fossils of these animals ammonis cornua ("horns of Ammon") because the Egyptian god Ammon (Amun) was typically depicted wearing ram's horns.[1] Often the name of an ammonite genus ends in ceras, which is Greek (κέρας) for "horn" (for instance, Pleuroceras).Originating from within the bactritoid nautiloids, the ammonoid cephalopods first appeared in the Late Silurian to Early Devonian (circa 400 million years ago) and became extinct at the close of the Cretaceous (65 m.y.a.) along with the dinosaurs. The classification of ammonoids is based in part on the ornamentation and structure of the septa comprising their shells' gas chambers; by these and other characteristics we can divide subclass Ammonoidea into three orders and eight known suborders. While nearly all nautiloids show gently curving sutures, the ammonoid suture line (the intersection of the septum with the outer shell) was folded, forming saddles (or peaks) and lobes (or valleys).Three major types of suture patterns in Ammonoidea have been noted: * Goniatitic - numerous undivided lobes and saddles; typically 8 lobes around the conch. This pattern is characteristic of the Paleozoic ammonoids. * Ceratitic - lobes have subdivided tips, giving them a saw-toothed appearance, and rounded undivided saddles. This suture pattern is characteristic of Triassic ammonoids and appears again in the Cretaceous "pseudoceratites." * Ammonitic - lobes and saddles are much subdivided (fluted); subdivisions are usually rounded instead of saw-toothed. Ammonoids of this type are the most important species from a biostratigraphical point of view. This suture type is characteristic of Jurassic and Cretaceous ammonoids but extends back all the way to the Permian.The three orders and various suborders of Ammonoidea are herein listed from most primitive to more derived. * Goniatitida (Devonian to Permian) -- have round saddles, pointed lobes o Anarcestina (Devonian only) o Clymeniina (upper Upper Devonian only) o Goniatitina (Devonian to Upper Permian) -- includes the true goniatites * Ceratitida (Carboniferous to Triassic) -- have round saddles, serrated lobes o Prolecanitina (Upper Devonian to Upper Triassic) o Ceratitina (Permian to Triassic) -- includes the true ceratites * Ammonitida (Permian to Cretaceous) -- have folded saddles and lobes, fractal patterns o Phylloceratina (Lower Triassic to Upper Cretaceous) o Ammonitina (Lower Jurassic to Upper Cretaceous) -- includes the true ammonites o Lytoceratina (Lower Jurassic to Upper Cretaceous) o Ancyloceratina (Upper Jurassic to Upper Cretaceous) -- the heteromorph ammonitesBecause ammonite... read more

Items in the Price Guide are obtained exclusively from licensors and partners solely for our members’ research needs.

Flag item for content or copyright

If this item contains incorrect or inappropriate information please contact us here to flag it for review.

If you are the originator/copyright holder of this photo/item and would prefer it be excluded from our community, contact us here for removal.