Ammonite is a fossilised sea creature that once resembled a snail and is said to be 65 million years old.
 
As the layers formed and created pressure on the shell, mineral-rich water would seep into the chambers and eventually crystallize into the rock-like fossil we find today.
 
Ammonite can sometimes end up with a rainbow-like sheen on the surface giving the name Opalized Ammonite.
 
£10 each
3cm x 3cm