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 from the Kangerlussaq Fjord, Ilimaussaq Complex, Greenland

Contributed by: Mark Cole
Date: Apr 6th, 2026
Locality: Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)

Description:
Tugtupite from this area within the Ilimaussaq Complex is typically fluorescent, a different color under all three wavelengths. It is also usually very phosphorescent. Sometimes tenebrescent, sometimes not.

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

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.
Normal light.
Normal light.
Normal light. Specimen size image compared to a US dollar bill.
Normal light. Specimen size image compared to a US dollar bill.

Summary of luminescence responses:

Tugtupite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Orange
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: White
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red

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