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An incredible, unusual gemmy and extremely tenebrescent tugtupite specimen from Kangerlussaq. Vugs with large and well-formed, gemmy tugtupite crystals – these kind of tug crystals are distinct to Kangerlussaq. In the middle of one side is some beautiful green chkalovite (some in crystal-form, it seems) coating some of the large tugtupite crystals within the vug. Not many pieces like these will ever hit the market.
Under midwave this piece glows all sorts purple-lilac, magenta, red colors. It also displays phosphorescence.
The brownish areas are still considered tugtupite.
The second side has some sodalite or hackmanite which shows as the purple tenebrescence versus the typical deep pink tenebrescence from tugtupite.
Museum quality. An outstanding tugtupite specimen.
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.
