Three good quality sectioned Dactylioceras ammonites from the Yorkshire.  All are situated nice and centrally in the nodule and show well defined chambers. 

These fossils have been wetted to show their features. 

Click here to learn more about polishing fossils

Fossil Polishing Kit available here (including wet-and-dry paper in various grits, felt wheels and tin oxide polishing powder - designed for home use with very basic kit).