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Orthoceras

Straight-shelled fossils from ancient seas.

Explore Orthoceras fossils, recognizable by their elongated shell forms and striking contrast when preserved in dark stone.

Featured Orthoceras

Explore Orthoceras selected for natural pattern, form and display appeal.

Mini Polished Orthoceras Fossil-Rocks and Gems Canada

Mini Polished Orthoceras Fossil

$10.00

Round Polished Orthoceras Fossil-Rocks and Gems Canada

Round Polished Orthoceras Fossil

$15.00

Polished Orthoceras Fossil-Rocks and Gems Canada

Polished Orthoceras Fossil

$45.00

Shop All Orthoceras

What Is an Orthoceras Fossil?

Fossils commonly sold as Orthoceras preserve the straight, tapering shells of extinct marine cephalopods. Cephalopods are the group of animals that includes today’s squid, octopuses and nautiluses.

These ancient shells contained internal chambers. In a fossil exposed by cutting or polishing, the divisions between chambers can appear as repeated lines along the shell. Look closely at a specimen to see how much of this structure has been preserved.

Bring Ancient Marine History Home

Discover Orthoceras pieces in a variety of forms, from smaller polished fossils to striking decorative displays.