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In this episode of The Atlas Obscura Podcast, we visit a small mineral museum in Dodgeville, Wisconsin, which is home to plenty of rocks—some of which may rival those in the Smithsonian National Museum of Natural History.

Our podcast is an audio guide to the world’s wondrous, awe-inspiring, strange places. In under 15 minutes, we’ll take you to an incredible site, and along the way you’ll meet some fascinating people and hear their stories. Join us daily, Monday through Thursday, to explore a new wonder with cofounder Dylan Thuras and a neighborhood of Atlas Obscura reporters.

Purple fluorite similar to this specimen mined in China can be found at the Museum of Minerals and Crystals.
Purple fluorite similar to this specimen mined in China can be found at the Museum of Minerals and Crystals. Rob Lavinsky, iRocks.com/CC-BY-SA-3.0