Iridescent Caloceras display ammonite with encrusting bivalves 25 This one is unusual as

This one is unusual as it also has several bivalve shells and serpulid worm tubes/casts that encrusted the ammonite after it died and lay resting on the Jurassic seafloor

The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut-flat base to allow it to stand freely by itself for display

and the mottled brown and yellow colour is beautiful and unusual for this species

Crinoid heads of this quality are rare

The fossil measures 24mm (0

Iridescent Caloceras display ammonite with encrusting bivalves 25 This one is unusual asA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The matrix measures 87 mm (3. 45 inches) tall and contains a large partial ammonite shell that measures 70 mm across. The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut flat base to allow it to be displayed freely standing. The ammonite shell is very well preserved and has been prepared