Appears to be a Perisphinctes virguloides ammonite fossil found in Madagascar. Fossil is from the Jurassic Period (201-145 million ye...

This specimen is a mix between a fossil and mineral (calcite crystals). It appears to be Prasopora bryozoan fossil. The fossil dates to t...

This appears to be a Saivodus ctenacanthus shark tooth (cladodont) fossil. It was found in Crawford County, Indiana USA. Fossil dates to...