Opalised Bivalve Shell #1

Name: Opalised Bivalve Shell

Age: 110 million years old

Locality: Lightning Ridge, New South Wales, Australia

Formation: Griman Creek Formation

Length: 25mm

Notes: This is an opalised bivalve shell from Australia. Unlike the marine shells from Coober Pedy, the other hotspot for opalised fossils in Australia, the shells from Lightning Ridge are less common and come from a freshwater river environment. This one is open, and clearly shows the ridged pattern of the shell it once was. A nice addition to my opal fossil collection.