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Deeply tenebrescent, these two tumbled sodalite stones display a bright fluorescence under UV light. The larger tumbled stone also contains light purple ussingite. The purple ussingite on this piece fluoresces a very rare green color under UV.
Ussingite from Ilimaussaq has three possible states: it can be non-fluorescent, fluoresce orange just like sodalite, or can fluoresce green as in this piece. The green fluorescing variety is by far the rarest. The rare green fluorescence comes from mixing with chkalovite. When ussingite fluoresces a more common orange, it is due to being mixed with Sodalite.
The smaller tumbled piece is almost solid green sodalite with excellent tenebrescence.
