"Sugar Cube" Fluorite - Var, Provence-Alpes-Côte d'Azur, France

Contributed by: FMS Admin
minID: PP8-DCA
Date: May 14th, 2026
Locality: Var, Provence-Alpes-Côte d'Azur, France (See on Mindat)
Size: 5.2 x 4.8 x 5.8 cm

Description:
Shown here is a fluorite specimen from the area of Le Muy, Var, Provence-Alpes-Côte d'Azur, France, which shows an unusual light blue fluorescence, instead of the more common darker blue glow commonly seen in fluorite. Nice addition to my longwave UV display, which now includes specimens fluorescing in all the colors of the visible light spectrum!

It fluoresces the same color under all three UV wavelengths; but as it is usually the case with fluorite, the brightest response is seen under longwave UV. Therefore, I did not include pictures of the weaker midwave UV and shortwave UV responses.

Originally posted by Frédéric Messier Leroux on Nature's Rainbows in 2021.

Fluorescence under longwave UV light.

Normal light.

Summary of luminescence responses:

Fluorite (Mindat) (RRUFF)

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