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!

Aragonite and calcite, Forrières, Liège, Belgium

Contributed by: FMS Admin
Date: Sep 19th, 2025
Locality: Forrières, Nassogne, Luxembourg, Wallonia, Belgium (See on Mindat)

Description:
Yellow fluorescent aragonite due to organic impurities and possible lattice defects. Red fluorescent calcite showing Mn2+ and Ce3+-OH complex emission. Black full: 365 nm, black dashed: 275 nm, grey dashed: 255 nm excitation.
Originally posted by groensteenfreterke on Nature’s Rainbow.

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 spectra.
Fluorescence spectra.
Fluorescence spectra.
Fluorescence spectra.

Summary of luminescence responses:

Aragonite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Yellow
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow
Calcite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red

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