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!

Greenlandic "Margarosanite" - Tugtupite and Chkalovite, Taseq Slope, Ilimaussaq Complex

Contributed by: Mark Cole
Date: Mar 26th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)

Description:
In 2005/2006 we discovered a pocket of tugtupite mixed with what we believe is chkalovite. The combination resulted in a beautiful pearlescent red/white fluorescence. One of the geo-tour members promptly nicknamed this material Greenlandic "Margarosanite".

Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.

Summary of luminescence responses:

Chkalovite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
Tugtupite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red

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