@kali66 Hi Kali - thanks for your comment. The opals form when water containing a lot of silica impregnates a rock as it forms or a shell or bone or leaf as it fossilizes. So you can get lots of really interesting results. Cheers Rob
@golftragic Hi Marnie! It's so nice to hear from you. I hope all is well in your part of the world. Looking forward to seeing some of your images again. Cheers Rob
@merrelyn LOL Merrelyn - we've always been a bit besotted about fossils - but unfortunately we tend to forget where we got them..... This is a favourite though. Thanks for your interest.
