We have run out of stock for this item.
*Note: Please make sure to right-click and print (or save) ID card located in the photo gallery for your records*
Rogerley fluorite is a famous type of fluorite from the Rogerley Mine in County Durham, England. These pieces set the bar for other fluorites on the market, they are simply some of the nicest out there. Under visible light, a nice specimen will contain gemmy emerald green fluorite crystal cubes.
Their fluorescence is so intense and bright, that even when exposed to sunlight, the UV from the sunlight will cause a noticeable color change to blue in the green fluorite crystals. We call this phenomenon, Daylight Fluorescence. It’s very cool to see in person.
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.
