Sellaite and Fluorite from the Fontsante Mine, France

Contributed by: FMS Admin
Date: Feb 26th, 2026
Locality: Fontsante Mine, Tanneron, Draguignan, Var, Provence-Alpes-Côte d\'Azur, France (See on Mindat)
Size: 5.5 x 3 x 5.5 cm
Weight: 125 g

Description:
This is an old Sellaite (MgF₂) (with minor Fluorite (CaF₂) specimen coming from the BRGM (Bureau de Recherches Géologiques et Minières) in Paris (site: www.brgm.fr/fr).
Both minerals are present in "massive form".
The best fluorescence is in LW, but it fluoresces in MW and SW too.
Sellaite is yellow-lemon and fluorite is weak blue gray.

Originally posted by Stefano Buzzoni on Nature's Rainbows.

Fluorescence under longwave UV light.

Normal light.

Summary of luminescence responses:

Sellaite (Mindat) (RRUFF)

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