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Oh yes, I have been there. It rained the day we went. Wet, raw diamonds are all but invisible, so we army crawled through the green mud all day... found a little tiny amethyst lol! No diamonds... had a blast though!
We lived in Conway for about 4 years, used to go to Mt Ida and hunt crystals ALL the time. That Herkimer mining is hard rock mining, you crack those babies out of the bedrock. The first time we pulled into Mt Ida and the PARKING LOT was made of little crystals I about turned into gollum. Mark was driving away, I was still hanging out the door grabbing more crystals after we had loaded the poor car down to the max already lol! I have very poor self control about rocks. :)

I was going to ask if you made it down to the Ouachitas hunting for crystals... I'm too lazy, there are so many roadside stands selling them lol!

Oh, we made a frequent day trip of it. We would stop by Hot Springs, soak our toes and get drinking water. Where we lived (Mayflower, we moved to Conway after about a year) the water was unfit to drink too often, we just always went and got water and we'd go get some crystals, have a picnic, it was a blast. You should do it at least once!