Tugtupite, Analcime, Chkalovite from the Taseq Slope, Greenland

Contributed by: Mark Cole
Date: Apr 6th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 4 x 2 x 5.5 inches
Weight: 1.56 lb

Description:
A fantasticly rich "eye" specimen of tugtupite on an analcime/lujavrite matrix. The cherry red tugtupite encircles chkalovite forming "eyes", while the analcime provides a backdrop of blue/white contrast. Areas of green fluorescence also due to chkalovite it is believed. Multi-color specimens like this are among the most sought-after Greenland fluorescent minerals. Only the tugtupite is fluorescent under longwave UV light.

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

Fluorescence under shortwave UV light.

Fluorescence under longwave UV light.

Normal light.

Summary of luminescence responses:

Analcime (Mindat) (RRUFF)

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
• Fluorescence under Longwave (365nm LED) UV light: Orange