So. Dakota Ammonites
Buried Treasure Fossils offers a large selection of top quality Ammonites for sale from Pierre Shale Fm., Pennington, So. Dakota, USA. These So. Dakota ammonites show exceptional external detail including pearly aragonite shell with some rainbow iredescence. Several specimens are still in their original matrix. Exceptional color. Great display and collection piece. Cretaceous age. Authenticity guaranteed.
- Hoploscaphites nodosus$185.00
A natural Hoploscaphites nodosus ammonite with excellent preservation of the shell material. This ammonite species exhibits big ribs with large tubercles (nodes). The shell is complete and matrix free. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.
SD05 Size: 2-1/2"
Note - Adding 10 So. Dakota ammonites in December 2020. --> Link to So. Dakota Ammonites
Learn More - Hoploscaphites nebrascensis$185.00
Three natural Hoploscaphites nebrascensis ammonites in a cluster with excellent preservation of the shell material. There are three ammonites in this cluster. The shell material has some natural 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. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece. Note - this specimen weighs 1.4 lbs. An international supplemental shipping charge will apply.
SD01 Size: 2"
Note - Adding 10 So. Dakota ammonites in December 2020. --> Link to So. Dakota Ammonites
Learn More - Hoploscaphites brevis$125.00
A natural Hoploscaphites brevis ammonite with great preservation of the shell material. The ammonite shell exhibits excellent natural iridescence. A matrix free specimen with a thick profile. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.
SD09 Size: 2"
Note - Adding 6 So. Dakota ammonites in August 2025. --> Link to So. Dakota Ammonites
Learn More - Hoploscaphites nebrascensis$115.00
A natural Hoploscaphites nebrascensis ammonite with excellent preservation of the shell material. The ammonite shell has some natural 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. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.
SD02 Size: 2-1/8"
Note - Adding 10 So. Dakota ammonites in December 2020. --> Link to So. Dakota Ammonites
Learn More - Hoploscaphites brevis$95.00
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
Learn More - Hoploscaphites nebrascensis$85.00
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
Learn More - Hoploscaphites brevis$85.00
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
Learn More - Hoploscaphites nebrascensis$85.00
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
Learn More - Hoploscaphites brevis$60.00
A natural Hoploscaphites brevis ammonite with great preservation of the shell material. The ammonite shell exhibits excellent natural iridescence. This specimen is sits in an original Pierre Shale with a flat base for a great display. The base is a large baculite segment. This ammonite is from the upper Cretaceous, Pierre Shale Fm. of So. Dakota. Authenticity guaranteed. A fantastic display piece.
SD10 Size: 1-1/16"
Note - Adding 6 So. Dakota ammonites in August 2025. --> Link to So. Dakota Ammonites
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