Ammonites

An 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 2.6 lbs.  International customers will not have free shipping. 

X280      Size: 6"  (2-1/8" wide)

Note - Adding 17 Madagascar ammonites in November 2024  -->   Link to Madagascar ammonites

A natural Hoploscaphites brevis ammonite with great preservation of the shell material. This specimen is sits in an original Pierre Shale with a flat base for a great display. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.

SD11        Size: 1-3/4"

Note - Adding 6 So. Dakota ammonites in August 2025.  -->  Link to So. Dakota Ammonites

An incredible sliced and polished Cleoniceras ammonite showing the intricate internal chamber structure with crystal lined pockets. A gorgeous Cretaceous ammonite from Madagascar. The exterior is natural with a hint of red flash. Authenticity guaranteed. A great gift item.   

X213       Size: 5-1/4"

Note - Adding 20 Madagascar ammonites in April 2023  -->   Link to Madagascar ammonites

A natural Hoploscaphites nebrascensis ammonite with excellent preservation of the shell material. This ammonite species exhibits big ribs with multiple rows of tubercles (nodes). This specimen is sits on an original Pierre Shale with a flat base for a great display. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.  

SD03        Size: 1-7/8"

Note - Adding 10 So. Dakota ammonites in December 2020.  -->  Link to So. Dakota Ammonites

A natural Hoploscaphites brevis ammonite with great preservation of the shell material. The ammonite shell exhibits some natural iridescence. A matrix free specimen. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.

SD08        Size: 2"

Note - Adding 6 So. Dakota ammonites in August 2025.  -->  Link to So. Dakota Ammonites

A natural Hoploscaphites nebrascensis ammonite with excellent preservation of the shell material. The ammonite shell has some iridescence. This ammonite species exhibits big ribs with multiple rows of tubercles (nodes). This specimen is sits in an original Pierre Shale nodule with a flat base for a great display. The end is filled with calcite crystals! This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.  

SD07        Size: 1-5/8"

Note - Adding 6 So. Dakota ammonites in August 2025.  -->  Link to So. Dakota Ammonites

The Ammonite Collection. A Top Quality Hyphantoceras oshimai ammonite from Hokkaido, Japan. This Cretaceous ammonite shows intricate structure. Good color! Authenticity guaranteed. 

AM09        Specimen size: 2-3/8" x 2"    

Adding an 11 piece ammonite collection in November 2023.       Link to Other Ammonites.

A Top Quality Craspedites nodiger ammonite specimen from Saratov, Russia.  Great white color.  Volgian, Jurassic age (145 mya). Authenticity guaranteed.

X254b        Size: 1-3/8"

Note - Adding 7 ammonites in December 2023.    ->   Link to Other Ammonites

An incredible whole Cleoniceras ammonite with a lightly polished exterior showing lashes of red and green in the aragonite shell material (produces an "opal-like sheen!"). A gorgeous Cretaceous ammonite from Majanga, Madagascar. No repair or restoration. Authenticity guaranteed. A great gift item.     

X234       Size: 4-1/2"  

Note - Adding 12 Madagascar ammonites in December 2024  -->   Link to Madagascar ammonites

An incredible whole Cleoniceras ammonite with a lightly polished exterior showing lashes of red and green in the aragonite shell material (produces an "opal-like sheen!"). A gorgeous Cretaceous ammonite from Majanga, Madagascar. No repair or restoration. Authenticity guaranteed. A great gift item.     

X233       Size: 4-1/2"  

Note - Adding 12 Madagascar ammonites in December 2024  -->   Link to Madagascar ammonites

An incredible whole polished Cleoniceras ammonite showing the intricate external chamber structure. A gorgeous Cretaceous ammonite from Madagascar. Authenticity guaranteed. A great gift item.

X208       Size: 3-1/4"

Note - Adding 20 Madagascar ammonites in April 2023  -->   Link to Madagascar ammonites

An incredible sliced and polished Cleoniceras ammonite showing the intricate internal chamber structure with crystal lined pockets. A gorgeous Cretaceous ammonite from Madagascar. The exterior is natural with a hint of red flash. Authenticity guaranteed. A great gift item.     

X217       Size: 4-1/8"

Note - Adding 17 Madagascar ammonites in November 2024  -->   Link to Madagascar ammonites