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!

Feldspar Crystal Cluster from Pakistan

Contributed by: Mark Cole
Date: Apr 4th, 2026
Locality: Shigar Valley, Shigar District, Gilgit-Baltistan, Pakistan (See on Mindat)
Size: 3 x 2 x 4 inches
Weight: 12.9 oz

Description:
Nice crystal of feldspar on a quartz matrix. Green fluorescing areas are uranyl activated coating.

Originally posted by Mark Cole on Nature's Rainbows in 2016.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light. Side 2
Fluorescence under shortwave UV light. Side 2
Normal light.
Normal light.

Summary of luminescence responses:

Feldspar (Mindat) (RRUFF)

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

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