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We’ve made contact with a miner in the Afghan areas and have a supply of mine fresh material. The fluorescent activators have not been studied very much from this area. It’s very unclear what is going on with most of the material from this locality, but as we get more material and discover new fluorescent minerals we will have them analyzed for proper IDs. But they sure do make for some confusing but amazingly beautiful fluorescent specimens. This piece (as most from Afghanistan) is best displayed using multiple wavelengths, and shows best under a combination of longwave, midwave and shortwave (fullwave) although it is very respectable under SW alone (second pic) - or even MW or LW alone.
Beautiful yellow scapolite and phlogopite crystals atop a matrix. Under shortwave UV, the calcite fluoresces a dark orange. Phlogopite is a bright butterscotch color under shortwave UV. Midwave causes the calcite to pop very nicely. Midwave and longwave bring out the bright yellow of the marialite very nicely. If we were to display it under only one light, we would probably pick shortwave, preferably with a midwave “kicker”.
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.
A major component of rock collecting (for us) is simply getting out in nature. A buddy dragged us out to a very remote area here in middle Tennessee to hunt for fluorescent green agate. Since we consider ourselves pure "Glow Hounds" we weren't anticipating any glow rocks, just the beauty of the area, but we brought our UV lights anyway.
