Gerastos Trilobite Fossils, In Matrix entomology 5”x12” as displayed with mouth

5”x12” as displayed with mouth open

It's also the origin of the term jet-black

or even display

pyrite (fool's gold) AND calcite

Resin-cast

Gerastos Trilobite Fossils, In Matrix entomology 5”x12” as displayed with mouthReal trilobites for sale! These ~1" long trilobites (most likely Gerastos granulosus) date back to the Devonian and were found in Morocco. Resembling horseshoe crabs, trilobites are an extinct group of arthropods that died off in the Permian mass extinction ~252 million years ago. They were one of the most successful and iconic of all early animals spreading across most of the globe and surviving for an incredible 270 million years! These are