Yes. You have to look around for them. We found several the last we were there
All range of gypsum from desert rose to satin spar selenite can be found here. That said, there are some hills at another park nearby with tons more. I believe it's at River Legacy East near the Elzie Odom Athletic Center. I'm from AR and have a pretty impressive quartz collection; these hills almost made my selenite collection just as big (mostly pretty good quality, too)!
Not sure, we were there for the natural setting for photography.
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