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!

Scheelite, Fluorite, Calcite - Yxsjöberg Mine, Ljusnarsberg, Västmanland, Sweden

Contributed by: Mark Cole
Date: Apr 7th, 2026
Locality: Yxsjöberg Mine, Yxsjö ore field, Ljusnarsberg, Örebro County, Sweden (See on Mindat)
Size: 3 x 2 x 4 inches
Weight: 21 oz

Description:
Yxsjoberg is a skarn-hosted tungsten-copper-beryllium deposit located in the Bergslagen mining district in south-central Sweden. The earliest records of mining at Yxsjoberg date back to the 18th and 19th centuries when the deposit was mined for copper. Scheelite was first identified in 1862, and tungsten was mined between 1918 and 1921. The mine was reopened several times since, mined for scheelite and fluorite. It was permanently closed in 1963 and flooded.

Under MW the scheelite fluoresces yellow and is quite striking. Add some longwave to bring out the fluorite and it\'s an amazing color blast. Under SW the scheelite is the typical bright blue/white. Longwave, of course, brings out the fluorite but there is still a yellow reaction in the scheelite. The ID label that came with this specimen calls out diopside but I don\'t see it.

The last two pictures show another excellent example of a rather pure scheelite from this same mine - photos and specimen courtesy Howie Green (MW and SW).

Originally posted by Mark Cole on Nature's Rainbows in 2018.

Fluorescence under longwave and midwave UV light.
Fluorescence under longwave and midwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Fluorescence under midwave UV light.
Fluorescence under midwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Normal light.
Normal light.
Fluorescence under midwave UV light.  Second scheelite specimen from the Yxsjoberg Mine.
Fluorescence under midwave UV light. Second scheelite specimen from the Yxsjoberg Mine.
Fluorescence under shortwave UV light. Second scheelite specimen from the Yxsjoberg Mine.
Fluorescence under shortwave UV light. Second scheelite specimen from the Yxsjoberg Mine.

Summary of luminescence responses:

Scheelite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Yellow
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Yellow
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
Fluorite (Mindat) (RRUFF)
  • Fluorescence under Longwave (365nm LED) UV light: Blue
Calcite (Mindat) (RRUFF)
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Red
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red