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!

Barite Crystals on Calcite - Muscadroxiu Mine, Sardinia, Italy

Contributed by: Mark Cole
Date: Mar 11th, 2026
Locality: Muscadroxius-Genna Tres Montis Mine, Silius, South Sardinia Province, Sardinia, Italy (See on Mindat)

Description:
Italian barite/calcite from the Muscadroxiu Mine in Sardinia - an old, classic locale which produced many beautiful specimens such as this. No longer producing, this is from an old collection and is rarely seen these days...

Originally posted by Mark Cole on Nature's Rainbows.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Afterglow after exposure to shortwave UV light.
Afterglow after exposure to shortwave UV light.
Normal light.
Normal light.
Fluorescence under shortwave UV light. Closeup
Fluorescence under shortwave UV light. Closeup
Normal light. Specimen size image
Normal light. Specimen size image

Summary of luminescence responses:

Baryte (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
Calcite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red

FMDB Home Page
Submit a new specimen!
My Collection