Lot of 5 Polished Flat Back Fossil Orthoceras Cabochons, Great For Jewelry MakingHeartland Artifact Auctions4.7(867)$103 days Left
Ammonite Fossil Found In Madagascar 240-66 Million Years Old Devonian Period To The CretaceousHeartland Artifact Auctions4.7(867)$10(1 bid)Feb 15, 2026
Big Whole Sutured and Polished AMMONITE Fossil from MadagascarWestern Sportsman LLC4.5(79)$50(20 bids)
Outstanding Iridescent Ammonite Fossil 110 Million Years Old Cleoniceras AmmoniteHeartland Artifact Auctions4.7(867)$10(1 bid)Feb 15, 2026
Big Whole Sutured and Polished AMMONITE Fossil from MadagascarWestern Sportsman LLC4.5(79)$40(14 bids)
Big Whole Sutured and Polished AMMONITE Fossil from MadagascarWestern Sportsman LLC4.5(79)$80(17 bids)
Fossil Ammonite 408 to 65 Million Years Old Paleozoic to Mesozoic EraHeartland Artifact Auctions4.7(867)$10(1 bid)Feb 15, 2026
Big Whole Sutured and Polished AMMONITE Fossil from MadagascarWestern Sportsman LLC4.5(79)$45(16 bids)
Big Whole Sutured and Polished AMMONITE Fossil from MadagascarWestern Sportsman LLC4.5(79)$65(10 bids)
Outstanding Iridescent Ammonite Fossil 110 Million Years Old Cleoniceras AmmoniteHeartland Artifact Auctions4.7(867)$10Feb 15, 2026
SoldAmmonites Shell Fossil SpecimenA fossil of a Ammonite but in the middle. Approximately 2 inches long. Fossil, specimem, vintage fossil, collectible fossils, mollusks fossil, mollusks, tabletop accessories and decor, home decor, tabSee Sold Price
SoldSuture Shell Ammonite Fossil Specimen.This halved ammonite has suture patterns and iridescence on is back side with a polished front. There is a Natural crack that appears to have been filled to its lower portion. It measures 11 1/2" longSee Sold Price
SoldXL 16 lb AMMONITE Fossil SpecimenXL AMMONITE Fossil Specimen from Morocco. It measures 11" Long x 9.5" Wide x 4" Thick and the Total Weight is 16 lbs 13 oz. The Ammonite shells are well-preserved as fossils in marine sedimentary rockSee Sold Price
SoldLot of Four Fossil & Mineral Specimens**Originally Listed At $150** Ancient Seas, ca. 400 to 1 million years ago. A nice mixed collection of sea fossils and crystalline geodes, including a wonderful spiralized ammonite shell with interiorSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenOpalized Shell Fossil Ammonite Cretaceous 100 M.Y.O. Madagascar 4"See Sold Price
SoldLot of Fossil SpecimensLot of fossils, including fossilized tree specimens, polished and unpolished ammonite, clam and other shells. Largest tree specimen 12 1/2"L, ammonite 3"-diameter (3 7/8"H total).See Sold Price
SoldPolished Moroccan Ammonite Fossil BowlFinely carved and polished stone centerpiece bowl; of curved, shell-like form; embedded with ammonite fossil specimens; L: 12 1/4"See Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenFossil Ammonite Irredescent Shell Center 100 M.Y.O. Madagascar 4"See Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenFossil Ammonite Opal Shell Cretaceous 100 M.Y.O. Madagascar 6"See Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenAmmonite Irredescent Shell Madagascar Cretaceous 4.5"See Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenSilver Opalized Shell Ammonite Cretaceous ~ MadagascarSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenRed Opal Flash Shell Ammonite Cretaceous ~ Madagascar 2.75"See Sold Price
SoldRainbow ammonite fossil specimenOpalized ammonite specimen-iridescent material in shell - possibly from Canada possible 400 million years oldSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenRed Fire Opal Shell Ammonite MadagascarSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, Specimen5" ammonite with opalized shell. Madagascar. Cretaceous, 100 million years oldSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenFossil ammonite with opalescent shell. Madagascar Cretaceous, 100 million years oldSee Sold Price
SoldAmmonite, Fossil, Rock, Natural, Collectible, SpecimenFossil Whole Sutured Ammonite with Irredescent Inner Shell 3.54"See Sold Price
SoldLarge Ammonite Fossil SpecimenDESCRIPTION: Large Ammonite fossil specimen. Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely relaSee Sold Price
SoldHuge double ammonite fossil specimenHuge double ammonite fossil specimen, Two beautifully preserved fossilized spiral shells on shale, mounted on natural stone base and slate plinth, 17"h x 14"l x 10"w (total), 12"dia x 7"d (larger), 7"See Sold Price
SoldLarge Ammonite Fossil Specimen - Mesozoic Era.Large Ammonite Fossil Specimen - Mesozoic Era. Fossilized specimen with 4 ammonites and one oblong fossil. Polished invertebrate specimens with roughened background stone. 24 1/2" L x 15" W.See Sold Price
SoldLarge ammonite fossil specimen, ex PhillipsLarge ammonite fossil specimen, ex Phillips, Cretaceous Period, North America, likely the Bearpaw formation, opalescent ammonite (Placenticeras meeki) with fiery iridescent Ammolite, 21"h x 22"w x 5"dSee Sold Price
SoldACANTHOCERAS AMMONITE FOSSIL SPECIMEN ON BASEOversized Acanthoceras ammonite fossil specimen, on a black rectangular base, apparently unmarked. Approximate Dimensions: overall h. h. 24", w. 14.75", d. 9".See Sold Price
SoldLarge Ammonite fossil specimenLarge Ammonite fossil specimen, Mounted on patinated metal stand, 14.5"h x 18"w (fossil), 17"h (incl. stand)See Sold Price
SoldLarge Ammonite Fossil SpecimenLarge Ammonite Fossil Specimen, median-line cut with quartz crystal inclusions. 13.75" L x 11.5" W x 3" D. Keywords: Fossils, Mineral specimens, Jurassic, CretaceousSee Sold Price
