Chemical Composition: CaCO3 - Complex with impurities; Hardness: 3.5-to-4-Hardness; Mineral Class: Organic-(Fossil); Color: Brown, Gray; Ammonitic - lobes and saddles are fluted; subdivisions are usually rounded instead of saw-toothed - characteristic of the Jurassic and cretaceous Ammonites. All our minerals and crystals are carefully measured with digital measuring instruments that provide the high accuracy of numbers/values! Geometric - numerous undivided lobs and saddles; eight lobes around the conch is characteristic of the Paleozoic Ammonites. Ammonite Fossil 70mm Spiral Shell Natural Fossilized Mineral Specimen Ammolite Jewelry (The above information is provided solely for informational purpose. Ammonite, Fossil Rock with Spiral Sea Shell Imprint. Archeology... You will get half of one fossil ammonite similar to the one in the listing, the size and the color of the ammonite may slightly vary as well due to the fact that all fossils are different. Ceratitic - lobes have subdivided tips; giving them a saw-toothed appearance and rounded undivided saddles - Triassic Ammonites. Kindly note that all stones are offered for decorative purposes only. Canadian Natural Ammolite, Ammonite Freeform Polished Cabochon Specimen Early ammonites, until the middle Jurassic, were smaller, usually less than 9 inches or 23 centimeters. Buy PZAZ Luster Brush PZ-6 Refill for Metal Polishing: Polishing & Buffing - ✓ FREE DELIVERY possible on eligible purchases Specimens have been found ranging from less than a centimeter to 2 meters in diameter. (see photo, the photos are taken under bright light)!
