Like Download 1.51 MB mineralized ammonite 2513 x 2080 pixels Canon PowerShot SX710 HS 14.372 mm f/4.5 1/20 s ISO 1250 Online since: 14 November 2018 Taken: 25 September 2017 CC0 / Public Domain ammonite petrified mineralized fossil spiral shell stone ridges cephalopod