Is this a fossil from Lightning Ridge

[Vopros]

Here are two microscopic images of an opal from Lightning Ridge, Australia.

The piece of the opal I filmed  is around 1/3 of the specimen length around 8 mm.

The dimensions of this opal are 25.000 x 20.000 x 10.000 mm

 

[Ludwigia]

Can you please point out to us where you are seeing a fossil in this and what kind of fossil it might be.