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!

Swedenborgite in Calcite from Langban, Sweden

Contributed by: FMS Admin
Date: Mar 8th, 2026
Locality: Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden (See on Mindat)

Description:
You can hardly distinguish between calcite and swedenborgite in white light. In SW-UV they could not be more different. Micheal Gaft, H. Yeates and Lev Nagli suggested that the presence of trivalent antimony may be the cause of the blue luminescence in a paper "Laser-induced time-resolved luminescence of natural margarosanite Pb(Ca,Mn)2Si)3O)9, swedenborgiteNaBe)4SbO)7 and walstromite BaCa)2Si)3O)9", European Journal of Mineralogy 2013.

Locality: Langban, Sweden

Source: Fluorescent Minerals Workgroup MKA : http://fluo.mineralogie.be/

Originally posted by Axel Emmermann on Nature's Rainbows.

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

Summary of luminescence responses:

Swedenborgite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (255nm LED) UV light: Blue
Calcite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (255nm LED) UV light: Red

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