Glow In The Dark

Erik Rintamaki has been walking the beaches of Lake Superior all of his life.

Rintamaki, now living in Brimley, grew up in the Upper Peninsula and spent pretty much every weekend or nice day on the beaches with his dad on the hunt for rocks. They spent most of their time searching for agate, a variety of quartz, popular with rock collectors or “rock hounds.”

“I’ve always loved rock collecting,” said Rintamaki. “There’s something peaceful and soothing about it. Plus, spending time with my dad made it even more special.”

But Rintamaki’s barometer for “special” was about to hit a whole new level.

In 2017, while testing out a UV light he’d bought on eBay for eight bucks, Rintamaki noticed a few small stones lined with various patterns in bright fluorescent orange. He’d never seen anything like it, and at 4:30 a.m., he found himself racing home from Vermilion with the rocks to look them up online and see what they were.

However, he couldn’t find anything. And not just online. After Google failed him, Rintamaki started bringing his discoveries to rock and gems shows that he would attend to sell agate.

“I took them to six or eight shows and showed them to probably 300 people I know there,” said Rintamaki. “And no one had any idea what they were.”

A friend of Rintamaki’s in California asked for a couple of pounds of stones and finally determined that they were a variety of syenite sodalite. And it was the Michigan Mineralogy Project (MMP) that determined this was something that had never been discovered in Michigan before. In fact, the MMP credited Rintamaki with the discovery of the first verified sodalite deposits ever documented in Michigan in its May 2018 edition of The Mineral News.

That was the beginning of Yooperlites.

With the opportunity to name his discovery, Rintamaki was informed that most rocks were named after the location in which they were found and had the suffix “ite.” While he considered some specific geographical names, Rintamaki finally hit on Yooperlite—a nod to the nickname for those from the Upper Peninsula.

“I’m a Yooper,” laughed Rintamaki. “It just felt right.”

Rintamaki, who is also a lapidarist (rock artisan), started taking his Yooperlite findings and grinding them into shapes and spheres and selling them to rock collectors. But it was when he struck on the idea to take other people out on rock collecting tours that his joy of identifying Yooperlites hit another level.

“It was only my second tour and as I was showing everyone how to shine the lights and look for Yooperlites that I asked if folks would let me know if they saw something, so I could record it.”

It was Shirley Klemmer who shouted out first and Rintamaki ran over to take some video. He posted it online that evening when he got home. By the time he woke up the next day, the video had gone viral. Rintamaki’s rock tour Yooperlites Facebook page, which had only 26 likes prior, had since propelled to more than 14,000.

“People were just so excited by the Yooperlites,” said Rintamaki. “All of a sudden I’m doing tours weekly, taking out hundreds of folks from all over the world.”

Tour groups from as far away as Japan have come to take Yooperlite tours and bring home the unique rocks for their collections. Rintamaki jokes that each tour is the same, where people slowly find one rock, then another and by the end, Rintamaki has to tear them away from the beach in the search for “just one more.”

What is it about these plain grey rocks that are really nothing special until you shine a UV light on them?

“It’s awesome to watch people discover Yooperlites,” said Rintamaki. “It’s like unlocking a secret with these stones. They may look like nothing special, but under just the right conditions—magic!”

Visit yooperlites.com to check out Rintamaki’s web store and sign up for the newsletter to get updates on tours.