While walking, he discovered a few flickering stones, emitting a slight glow when exposed to ultraviolet light - it seems they were formed by a part of molten lava.
Rintamaki named them "yooperlite", a word referring to the locals from Upper Michigan, often referred to as the "Yooper".
In the video made by Rintamaki below, you will see the stones flickering under ultraviolet light:
Yooperlite fluorescent stone
Researchers from Michigan Technological University and Saskatchewan University have studied and analyzed the above-mentioned stones to find out their composition and origin.
In a paper published on Mineral News, they announced that the stones were just syenite containing sodalite.
The lithosphere is a lava rock formed by lava that slowly cools deep below the earth's surface. Its crystals can be several millimeters long, sometimes a few centimeters.
Although this stone is similar to granite, it is darker in color because it contains a higher content of fossil minerals, including pyrite (pyroxene) and amphibole.
What makes yooperlite so special is that it contains sodalite, a fluorescent mineral jelly.
To the naked eye, these stones - made up of oxygen, silicon, chlorine, sodium, and aluminum - are bluish gray with white streaks. Therefore, it is often used in mosaic products, but when placed under long-wavelength ultraviolet light, sodalite will light up, making the stone appear red-yellow lines look extremely magical.
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