u/JustinSamuels691

While removing the matrix on a piece of Austrailian opal from lightning ridge, I started to notice a very biological shape emerge. Wondering this could potentially be fossil, or if clearly not, what characteristics are missing. While I am aware that opalized fossils of vertebrates are exceedingly rare, I notice a strong resemblance to a reptilian scalar pattern here….

I cleared some sandstone off a small piece of rough I purchased. I know vertebrate opal fossils are rare but it looks unmistakably like the scales of a crocodile tail.