Described by their finder as "Yoopalite" rocks, a cache of fluorescent sodalite-laced stones was found on a Michigan beach. The apparently bland, well-weathered pebbles light up under 365nm; agate-hunter Erik Rintamaki discovered them in 2017 while experimenting with ways to reveal the rare stones.
I actually sold a few to at Michigan Tech University, and they sent them out for testing and they contacted me through emails and told me I probably had something new that had never been found in Michigan before, and I ended up being published in the Mineral News in 2018 for that discovery," Rintamaki said.
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