Fluorescent Mineral Database

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:

Calcite (Mindat) (RRUFF)

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

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