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An incredible hackmanite specimen with unusual minerals and many colors. This specimen has a mix of orange fluorescing ussingite, polylithionite, green chkalovite and bright fluorescent sodalite. There is a beautiful light blue fluorescence under shortwave and midwave that is unknown, we've not seen it before. We're constantly finding new minerals from Greenland. Its strongest under midwave UV light and possibly slightly phosphorescent.
We found very little of this type of material.
Ussingite from Ilimaussaq has three possible states: it can be non-fluorescent, fluoresce orange just like sodalite, or can fluoresce green. When ussingite fluoresces a more common orange, it is due to being mixed with sodalite. It is slightly tenebrescent where the sodalite has mixed with the ussingite.
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.
