Large, natural cluster of trilobite in its original fossil matrix. The Asaphid trilobites include some of the most extreme trilobite adaptations kn...

Fossilized ammonite half which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite with...

Fossilized ammonite half which reveals the internal chambers lined with calcite crystals. The ammonite has been naturally replaced by calcite with...

A beautiful, fossilized and calcified ammonite shell with an iridescent, opalized shimmer, displaying hints of vibrant red and yellow tones. This s...

A beautiful, fossilized and calcified ammonite shell with an iridescent, opalized shimmer, displaying hints of vibrant red and yellow tones. This s...

A beautiful, fossilized and calcified ammonite shell with an iridescent, opalized shimmer, displaying hints of vibrant red and yellow tones. This s...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

An ineradicable, large Crotalocephalina gibba, Crotalocephalina trilobite is an extinct genus of trilobite in the order Phacopida found in Morocco....

An ineradicable, large Crotalocephalina gibba, Crotalocephalina trilobite is an extinct genus of trilobite in the order Phacopida found in Morocco....

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Trilobites, an early arthropod relative of spiders, horseshoe crabs, and scorpions, preserved in this level of detail only occurred as a result of ...

Museum-quality, fossilized and calcified ammonite shell with an iridescent, opalized shimmer displaying hints of vibrant red. The fossilized shells...

A beautiful, fossilized and calcified ammonite shell with an iridescent, opalized shimmer, displaying hints of vibrant yellow tones. This specimen ...

Museum-quality, fossilized and calcified ammonite shell with an iridescent, opalized shimmer displaying hints of vibrant red. The fossilized shells...

Ptychopariida is a large, heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in th...

Museum quality, 8" tall stone containing many small ammonite fossils. The ammonites are of the species Promicroceras marstonense and are Lower Jura...

Museum quality, 5" tall stone containing many small ammonite fossils. The ammonites are of the species Promicroceras marstonense and are Lower Jura...

Museum quality, 8" tall stone containing many small ammonite fossils. The ammonites are of the species Promicroceras marstonense and are Lower Jura...

From the Eocene epoch. Monte Baldo, Italy. This rare and superb crab fossil comes from the limestone layers situated near Vicenza in Italy. The thr...

This beautiful French fossil echinoderms covers its yellowish and undulating matrix with "dunes" mimicking the ancient ocean floor. The smooth dis...

This specimen is a top quality, well preserved Spinosaurus vertebre. Spinosaurus (meaning "spine lizard") is a genus of theropod dinosaur that liv...