Yooperlites are crystals found in the Upper Peninsula of Michigan, which is how they get their name (people who live in the Upper Peninsula call themselves “Yoopers” – a play on the UP, short for Upper Peninsula). Yooperlites look like common lake rocks during the daylight…but with the help of a dark, night sky and a blacklight, they come to life, with spots that glow a neon orange. This phenomenon is caused by a type of uv-reactive sodalite.
