Ammonites
Buried Treasure Fossils offers a large selection of top-quality ammonites for sale. Our diverse inventory features specimens sourced from France, Madagascar, Morocco, Russia, and beyond. We offer a variety of types, including pyrite, red flash, natural, and cut-and-polished ammonites, as well as delicate Orthoceras fossils.
Our ammonites are complete specimens with no repairs, often showcasing exceptional color, internal crystals, and pyrite replacement. Authenticity is guaranteed, making these fossils excellent additions to any collection or lavish gifts.
- Kranosphinctes (Perisphinctes) sp.$795.00
An INCREDIBLE, EXTRA LARGE, natural Kranosphinctes ammonite showing a very nice external design from Saharaha, Madagascar. A January Fossil of the Month. Excellent shell surfaces. Very thick and heavy. Jurassic age. Very thick and heavy. A gorgeous display item with a custom steel stand! Authenticity guaranteed. Note - This item weighs 38 lbs. International customers will not have free shipping.
X270 Size: 14" x 12.5" (5-1/2" wide)
Learn More - Orthoceras sp.$495.00
An EXTRA LARGE, incredible polished Orthoceras plate showing the intricate internal chamber structure from Morocco. These are Devonian age squid-like creatures. Gorgeous jet black and white colors. There are 18+ Orthoceras specimens exposed. Largest Orthoceras is 12" inches in length. A top quality Orthoceras plate. Authenticity guaranteed. An incredible display piece! It includes a sturdy steel stand. Note: Large and heavy Orthoceras plates will require a supplemental international shipping charge. This items weighs 28 lbs. to ship. Please request quote.
M2021 Plate size: 21-1/2" x 16"
Note - Adding one Orthoceras specimen in January 2025. Link to Othoceras plates
Learn More - Nautiloid sp.$350.00
A LARGE, incredible natural Nautiloid ammonite from the Cretaceous of Madagascar. The aragonite shell is nicely articulated. Very wide (thick), fully inflated, and very heavy. Exceptional color and preservation. A gorgeous display item! Authenticity guaranteed. Comes this the chrome steel stand as photographed. Note - This item weighs 6.85 lbs. International customers will not have free shipping.
X274 Size: 6" (4-1/2" wide)
Note - Adding 6 Madagascar ammonites in July 2023 --> Link to Madagascar ammonites
Learn More - Hoploscaphites nodosus$325.00
A natural Hoploscaphites nodosus ammonite and a Nautilus (Eutrephoceras) with excellent preservation of the shell material. A December Fossil of the Month. This ammonite species exhibits big ribs with large tubercles (nodes). Both ammonites are nicely displayed on their original Pierre Shale matrix with a flat base. Matrix size is 4.5" x 2.5". This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece. Note - this specimen weighs 1.6 lbs. An international supplemental shipping charge will apply.
SD06 Size: 2-3/4" & 2"
Note - Adding 10 So. Dakota ammonites in December 2020. --> Link to So. Dakota Ammonites
Learn More - Cleoniceras sp.$325.00
An EXTRA LARGE, incredible whole polished Cleoniceras ammonite showing the intricate external chamber structure. A gorgeous Cretaceous ammonite from Madagascar. Authenticity guaranteed. A chrome easel stand is included with this ammonite. A great gift item.
X201 Size: 8" (1-3/4" wide)
Note - Adding 17 Madagascar ammonites in November 2024 --> Link to Madagascar ammonites
Learn More - Nautiloid sp.$275.00
A LARGE, incredible natural Nautiloid ammonite from the Cretaceous of Madagascar. The aragonite shell is nicely articulated. Very wide (thick), fully inflated, and very heavy. Exceptional color and preservation. A gorgeous display item! Authenticity guaranteed. Comes this the chrome steel stand as photographed. Note - This item weighs 6 lbs. International customers will not have free shipping.
X276 Size: 5-5/8" (4-1/4" wide)
Note - Adding 6 Madagascar ammonites in July 2023 --> Link to Madagascar ammonites
Learn More - Quenstedticeras lamberti$250.00
Two LARGE, TOP QUALITYQuenstedticeras lamberti ammonites on matrix from the Saratov region of Russia. Incredible pyrite replaced ammonites. The natural shell exterior is incredily preserved and reflects an iridescent red color. Middle Jurassic age. Authenticity guaranteed. Note - supply of these pyrite ammonites stopped in 2010. A very showy display piece. Note - specimens are remounted on their natural matrix. A fantastic gift piece.
AM02 Specimen size: 2-5/8" & 1-3/4" Display size: 3-3/4" x 2-3/4"
Adding an 11 piece ammonite collection in November 2023. Link to Other Ammonites.
Learn More - Kosmoceras - Quenstedticeras lamberti$250.00
A TOP QUALITY Kosmoceras sp. and Quenstedticeras lamberti ammonites on matrix from the Saratov region of Russia. Incredible pyrite replaced ammonites. The natural shell exterior is incredily preserved and reflects an iridescent red color. Middle Jurassic age. Authenticity guaranteed. Note - supply of these pyrite ammonites stopped in 2010. A very showy display piece. Note - specimens are remounted on their natural matrix. A fantastic gift piece!
AM01 Specimen size: 2-5/8" & 1-1/4" Display size: 5-3/4" x 4"
Adding an 11 piece ammonite collection in November 2023. Link to Other Ammonites.
Learn More - Kranosphinctes (Perisphinctes) sp.$245.00
A LARGE, exceptional natural Kranosphinctes (Perisphinctes) ammonite showing a very nice external design from Saharaha, Madagascar. Jurassic age. A gorgeous display item! Authenticity guaranteed. Note - This item weighs 7 lbs. International customers will not have free shipping.
X275 Size: 8-3/4" (2-1/2" wide)
Note - Adding 17 Madagascar ammonites in November 2024 --> Link to Madagascar ammonites
Learn More - Cleoniceras sp.$200.00
An incredible polished Cleoniceras ammonite from Madagascar. This gorgeous ammonite shows the intricate internal chamber structure pattern. Fantastic red brown color. Very showy. Authenticity guaranteed.
AM03 Specimen size: 6" x 4-3/4" x 1-1/2" Thick
Adding an 11 piece ammonite collection in November 2023. Link to Other Ammonites.
Learn More - Lituites breynius$195.00
The Ammonite Collection. A Top Quality Lituites breynius nautiloid from the Lituites Layer, Hupei, China. This Middle Ordovician (450 mya) nautiloid is prepared to show the internal structure. A very unusual early nautilod. Very good preservation. Nice color! Authenticity guaranteed.
AM05 Specimen size: 9-1/4" x 1"
Adding an 11 piece ammonite collection in November 2023. Link to Other Ammonites.
Learn More - Crioceras loryi$195.00
A gorgeous, very rare early Cretaceous Crioceras loryi ammonite specimen from Drome, France. A rare uncoiled, spiny Ammonite with external spikes preserved. This is a Lower Cretaceous ammonite (Lower Hauterivian) - 135 MYA. Authenticity guaranteed.
FR304 Size: 2-1/4"
Learn More












