I was out hiking and I found an area with a bunch of these stone's, you chip away the white and it looks like opal but I don't think its opal, does anyone know what it is and is it worth going back to get more? Much thanks...
Chalcedony with what appears to be some sandrox *pretty sure I spelt it wrong, someone will set me right* in the brown areas. Certain formations of this material can yield fire agate.
I'd say fire agate, yay I'm learning to notice fire agate =D I replied to a couple posts with a similar look to your rock, there more new, go check them out to compare =)