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Honey-colored dogtooth calcite crystals sit atop a fluorite matrix. Phosphorescent and brightly fluorescent all three wavelengths. A beautiful addition to any collection.
"Dogtooth Calcite" is a unique type of crystal and the name refers to the shape of the calcite crystals - a scalenohedral shape which resembles dogs’ teeth. Dogtooth calcite often occurs in caves or environments where the crystals can grow in an open space, such as geodes.
They were nicknamed "Yooperlites" which is derived from the name “yooper”. A yooper is a nickname for the Upper Peninsula natives and these fluorescent stones quickly gained fame. After data was published on these fluorescent stones, it was discovered that sodalite is the actual true mineral that is fluorescing orange.
365nm UV light is often called "blacklight". Before the advent of longwave UV LEDs, blacklight fluorescent tubes, (the kinds used in hippie days to light up psychedelic posters) were the standard longwave UV light for our hobby. They were not very powerful but they did light a large area.
Enter 365nm UV LEDs
First, an animation showing the difference between the UV flashlight we recommend (365nm filtered UV flashlight) versus unfiltered 395nm UV flashlights we see many folks carrying around at shows. So. much. visible purple light. We selected a bunch of rocks as a demonstration. Took pictures of them under his flashlight without the filter and then with the filter.
