Fluorescent Mineral Database

A new secret project! Trying to create a nice Fluorescent Mineral Database (FMDB), which would be searchable by mineral, locality, and luminescence properties. Also making it easy for people to contribute with their own specimens!

Tugtupite, Sodalite, Analcime, Chkalovite - Greenland

Contributed by: Mark Cole
Date: Apr 11th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 4 x 2.5 x 4 inches
Weight: 2.08 lb

Description:
Tugtupite fluoresces a cherry red under SW and encircles a whitish/magenta fluorescing chkalovite. Bluish fluorescence is analcime, and the orange is sodalite. Most areas of green fluorescence are uranyl activated. Sodalite areas are nicely tenebrescent.

This combination species has been given the nickname "Fantasy Rock" for the wildly fluorescent and colorful varieties found on the Taseq Slope, Ilimaussaq Complex, Greenland. Full set of pictures in the gallery below....

Originally posted by Mark Cole on Nature's Rainbows in 2017.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.
Fluorescence under shortwave UV light. Closeup
Fluorescence under shortwave UV light. Closeup
Fluorescence under longwave UV light. Side 2.
Fluorescence under longwave UV light. Side 2.
Tenebrescence after exposure to shortwave UV light.  Side 2.
Tenebrescence after exposure to shortwave UV light. Side 2.
Normal light. Side 2.
Normal light. Side 2.

Summary of luminescence responses:

Sodalite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Orange
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Orange
Tugtupite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
Analcime (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
Chkalovite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White