We've got some world quality amethyst down here in AZ. I've been wanting to ask the owners if I could walk the site or tour the mine, but don't know if they'd let me. I know they've arrested trespassers but at least I'd have asked. Just kinda getting started in this hobby. Been staring at rocks for years and collected a couple, but now I've got way too much free time on my hands. Your pics are quite nice to see. Great finds.
Just go and ask! Don't be shy about it and you may be surprised. You have nothing to lose, if you are refused, and everything to gain if you are allowed on the property. The simple fact that your asking shows respect to the owner.