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!

Corundum var. Ruby in Andesine - Arendal, Norway

Contributed by: FMS Admin
Date: May 3rd, 2026
Locality: Kleggåsen Ruby Quarry, Froland, Agder, Norway (See on Mindat)
Size: 5 inches

Description:
An extraordinary 5-inch example of corundum var. ruby in andesine from Norway. Photographed in LW. There is no response under SW. This piece sold in 1968 for $30. The LW+White Light pictures are something new that I am experimenting with. Not only does it help the red settle down, it often brings out other colors.

Originally posted by UV Studio on Nature's Rainbows in 2016. The original post did not identify which image is LW and which image is LW + White Light. Captions are a best guess.

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light and white light.
Fluorescence under longwave UV light and white light.
Normal light.
Normal light.
Normal light. Side 2.
Normal light. Side 2.
Fluorescence under longwave UV light. Side 2.
Fluorescence under longwave UV light. Side 2.
Fluorescence under longwave UV light and white light. Side 2.
Fluorescence under longwave UV light and white light. Side 2.

Summary of luminescence responses:

Corundum var. Ruby (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Red

FMDB Home Page
Submit a new specimen!
My Collection