>>213767473
Pick ones that have specimen photos from nearby locales, you might even find some that have instructions to the tailings. Just explore the shit, you'll figure it out, Make sure you take plenty of water, pack some protection, don't cross any fences if they're not meant to be crossed etc - take a rock hammer and maybe a sledge. Tons of malachite and chrysocolla still all over the place in the desert outside where every copper mine once was, sometimes bright blue azurite and if you're lucky gem silica or turquoise.
>>213767471
There's absolutely no telling, the green one is even a hard guess without seeing more, seeing it in person, cutting it or otherwise doing some sort of test on it. I dont fucks with too many of those rare ones because they're a hard sell and you have to send them in to some place to be certified before you can sell them. In the US that's GIA, who will preform an XRD and mass spectroscopy majigdobabber on it and give you a paper saying it's real certified brown shit
the green stuff however looks like it could be made into jewlery with the right cut and as we all know shiny colorful shit sells
