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This specimen has a mix of non-fluorescing ussingite and bright fluorescent sodalite. There’s also minor tugtupite veining and polylithionite. 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.
The Garpenberg mine is located in Bergslagen, a very old mining area in the southern part of Sweden.
The mine is very active today and is one of Europe's most progressive underground mining operations. Collecting is not possible, and the few specimens that reach collector's hands are highly prized. The mineralogy is quite similar to that of Franklin NJ.
