Fossil Worm Cast/ holes
$100
These unusual opal fossils from Lighting Ridge in NSW Australia are believed to be the excavation holes of ancient worms or shrimps. Some of these pieces show colour others are potch. Mined by Chris Chancerel at the Grawin in Lighting Ridge in the late 1980’s.
These cast are Cretaceous 100 million years old. Largest 25mm x 17 mm x 11