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!

Willemite, Fluorite, Calcite - Garpenberg, Sweden

Contributed by: Daniel C. Montero
minID: T48-WAE
Date: May 5th, 2026
Locality: Garpenberg Norra Mine, Garpenberg, Hedemora, Dalarna County, Sweden (See on Mindat)
Size: 10.1 x 3.5 x 16 cm
Weight: 605 g

Description:
Photo under shortwave and longwave UV simultaneously allows easy differentiation of the minerals and reveals patterns in the rock formation, the willemite shows green fluorescence, calcite is red-orange and fluorite is blue. Shortwave UV shows green willemite and red calcite. Longwave UV shows blue fluorite.

Originally posted by Daniel C Montero on Nature's Rainbows in 2021.

Fluorescence under longwave and shortwave UV light.
Fluorescence under longwave and shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
Fluorite (Mindat) (RRUFF)
  • Fluorescence under Longwave (365nm LED) UV light: Blue
Willemite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green

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