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!

Sørensenite, Tugtupite - Kvanefjeld, Ilímaussaq complex, Kujalleq, Greenland

Contributed by: Daniel C. Montero
minID: DQT-FNG
Date: May 4th, 2026
Locality: Kuannersuit Plateau (Kvanefjeld), Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 26 x 20 x 51 mm

Description:
This is a very unusual combo with the rare sørensenite associated with tugtupite.

Its best response is under shortwave UV light, sørensenite fluoresces bluish, while tugtupite is bright red, pink/orange under midwave UV light and orange under longwave UV light.
The tugtupite is also tenebrescent.

Originally posted by Daniel C Montero on Nature's Rainbows in 2023.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under midwave UV light.
Fluorescence under midwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Tenebrescence after exposure to shortwave UV light.
Tenebrescence after exposure to shortwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Sorensenite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (255nm LED) UV light: White
Tugtupite (Mindat) (RRUFF)
  • Fluorescence under Longwave (365nm LED) UV light: Orange
  • Fluorescence under Midwave (305nm LED) UV light: Pink
  • Fluorescence under Shortwave (255nm LED) UV light: Red

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