Sodalite var. Hackmanite, Tugtupite, Chkalovite, Analcime(?) - Ilimaussaq Complex, Greenland

Contributed by: Mark Cole
Date: Apr 14th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 4 x 1.5 x 6 inches
Weight: 24.7 oz

Description:
This material is striking. The sodalite appears as crystal blebs in matrix, with a few spots of tugtupite encircling a bright white chkalovite. Areas where the sodalite contacts the matrix are fluorescent a bright bluish/white (perhaps with a green tint). Conventional wisdom has been that this is analcime, but I am having my doubts. The fluorescent analcime from this area is bright blue/white and usually solid (massive) crystals. This is different. The fluorescence also occurs in the black area (which is non-fluorescent lujavrite). Also, beautiful little sprays of dark green aegirine crystals cover both faces. Another Greenland beauty (and mystery).

Originally posted by Mark Cole on Nature's Rainbows in 2016.