Rainbow iridescent Caloceras ammonite fossil display piece 91mm 25 The metallic iron pyrite colour

The metallic iron pyrite colour and shine is beautiful

A highly pyritised ammonite fossil of the species Echioceras raricostatum from the world-famous Jurassic Coast beach of Charmouth

The fossil measures 110 mm (4

85 inches) across and the fossil ammonite measures 16 mm (0

The piece of limestone matrix measures 88 mm (3

Rainbow iridescent Caloceras ammonite fossil display piece 91mm 25 The metallic iron pyrite colourA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The piece of thin limestone matrix measures 213 mm (8. 4 inches) across and contains a single partial ammonite that measures 91 mm (3. 6 inches), which is large for this species. The ammonite is very well preserved and has been prepared out of the rock to reveal the shell, which displays some stunning iridescent colours that change depending