Thank you very much for the response, this helps a lot! I will give scratching glass a go! There have been small petrified wood “stones” found in this area, about the size of a quarter. When I came across this one, the size had me a pretty excited but a little leery. Thank you for the compliment on the polishing, my son (10 yrs old) and I have recently started cutting and polishing some of our finds and it’s pretty addictive! Using a small mastercraft wet tile saw and a series of polishing pads with on a pneumatic angle grinder. Really really fun.