A few nice image images I found:
Fossil bony fish
Image by Reigh LeBlanc
I used The GIMP free photo editing software to join three images of this fossil bony fish together. I used the Pandora plug-in to help. Two of the three layers needed to be re-sized but I found I did not need to blend. If you really blow the image up you can see where I missed the alignment slightly.
As a first attempt to use this panorama software I don't think it is half bad.
The fossil itself is quite beautiful in close up. Ain't science grand?