I have a large amethyst geode that I bought at the BroAdmoor in Colorado Springs, a bunch of crystal spires, spheres, hearts, hand coolers, pyramids, and 65 million year old Ammonite Conch halves.

I live near The Land Between the Lakes in TN/KY which is said to be full of geodes. Perhaps you are familiar with that area. Also, there is the Crater of Diamonds State Park in Murfreesboro, Arkansas.