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!

Prosopite, Thomsonite, Ralstonite from Ivigtut, Greenland

Contributed by: Howie Green
Date: Mar 9th, 2026
Locality: Ivigtut Mine, Ivigtut stock, Arsuk Fjord, Sermersooq, Greenland (See on Mindat)

Description:
Prosopite can form as an alteration product in cryolite-bearing pegmatites, either as a primary mineral or as an alteration product of cryolite. Shown under shortwave UV.

Originally posted by Howie Green on Nature's Rainbows.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Prosopite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue

FMDB Home Page
Submit a new specimen!
My Collection