5.2" Cut/Polished Vivianite Nodule - Demons Bluff, Australia

This is a large half nodule of deep blue/green Vivianite which has been cut and polished. These Vivianite nodules are found at Demons Bluff near Anglesea, Australia, having washed ashore from submarine outcrops of black carbonaceous and pyritic Anglesea Sand Beds.

It's theorized that the Vivianite nodules from this location actually represent the trace fossils of crab burrows. The crab burrows filled up with debris and phosphate which under very specific conditions formed the Vivianite.
DETAILS
SPECIES
Vivianite
LOCATION
Demons Bluff, Anglesea, Victoria, Australia
SIZE
5.2" wide,
ITEM
#41507