Unique Sorensenite - Fluoresces Yellow Under Longwave
Contributed by: Mark Cole
Date: Mar 14th, 2026
Locality: Sørensenite occurrence (2004-find), Kuannersuit Plateau (Kvanefjeld), Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 2.5 x 2.5 x 4 inches
Weight: 11.8 oz
Description:
As if sorensenite is not unique enough - only found in one location in the world: Greenland - this piece is the first I have ever seen that is fluorescent a bright yellow under longwave UV (UVA). Sorensenite is a rare, beryllium-tin silicate only found in the Ilimaussaq Complex in Greenland, and only in a few areas. Normally it is nicely fluorescent a creme color (yellowish white) under shortwave and not at all (or maybe weakly) fluorescent under longwave. Usually found embedded in a tough analcime matrix and often found with uranyl activated green fluorescence. Some pieces will have minor sodalite associated, and really special pieces can be found with associated tugtupite.
Originally posted by Mark Cole on Nature's Rainbows.
Summary of luminescence responses:
Sorensenite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Yellow
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White