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!

Ruby - Froland, Aust-Agder, Norway

Contributed by: FMS Admin
minID: JL7-5AT
Date: Feb 22nd, 2026
Locality: Kleggåsen Ruby Quarry, Froland, Agder, Norway (See on Mindat)
Size: 74 x 38 x 78 mm

Description:
Macro photos of dark purple ruby crystals in a matrix of muscovite and feldspar. Famous locale for nice crystals with bright red fluorescence. The field of view shown is 35mm.

Originally posted by Dennis Michael on Nature's Rainbows.

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Corundum var. Ruby (Mindat) (RRUFF)

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

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