Love fossils too, and the spiral shape is gorgeous. @30pics4jackiesdiamond I have no idea, why you tag me for this? ;-) I'm not young anymore, but not yet a real fossil. I'm not able to answer this question,... But the ammonites lived around 65 to 48 MILLION years ago - from the time of Lower Devon until the end of the Cretaceous period. https://365project.org/mona65/2015-plan-b-alb/2010-05-07
Thanks for the fav too!