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!

Eucryptite - Harding Mine, Taos County, New Mexico

Contributed by: Chris Clemens
Date: Apr 25th, 2026
Locality: Harding Mine, Picuris District, Taos County, New Mexico, USA (See on Mindat)
Size: 5.24 x 2.78 x 8.72 cm
Weight: 139 g

Description:
This specimen contains intensely red fluorescent eucryptite in weak blue, fluorescent spodumene, from the Harding Mine (Harding pegmatite), near Dixon, Taos County, New Mexico. This piece is at its brightest under shortwave UV, but also shows a similar, but dimmer response under midwave UV. The longwave fluorescence is very weak (not pictured).

Originally posted by Chris Clemens on Nature's Rainbows in 2016.

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

Summary of luminescence responses:

Eucryptite (Mindat) (RRUFF)

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

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