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There is also a rare bivalve shell that attached itself to the ammonite when it was lying on the seafloor before being fossilised
These crinoid heads are rare and not often offered for sale
The fossil measures 80 mm (3
The piece of limestone matrix measures 90 mm (3
The fossil weighs 195 grams and has a cut flat base to allow it to stand freely for display
Subtly green iridescent Caloceras display ammonite crinoid There is also a rareA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The matrix measures 123 mm (4. 95 inches) across and contains an ammonite that measures 81 mm (3. 2 inches) across, which is large for this species. 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. The ammonite is very well
