Fossils are fun. Their shapes, sizes and color palettes make working with them fun.

The elongated segmented Orthoceras fossils with their black and white and grays presented different challenges.  The large Orthoceras, on the left,  I simply gave a ladder bezel of sparkling two cut beads and a necklace of graduated black onyx beads with silver accents. The smaller Orthocersa fossils, on the right, I mounted on leather, used silver three cut beads in the background, white pearl ceylons to outline and edged the necklace with silver "E" beads. The earrings were backed with leather and merely outlined with  silver three cut beads.

Ammonites have beautiful warm earth tones of brown lending themselves to pairing with bronze, gold and crystal beads. The example on the left is actually a worry stone, which I turned into a necklace. The example on the right is a cabochon.
Both were backed with leather and ,of course, have spiral rope necklaces.
They are so much fun to work with!