A 3.7 cm long Ichthyosaur vertebra from the Posidonia shale from the quarry Kromer near Holzmaden.
Here two more pictures:
And a bad picture of the unprepped vertebra:
The stone was extremely hard so the prep work was very difficult.
- ichthyosaur vertrebra
- posidonia shale
- quarry kromer
- lower jurassic