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!

Deep Red Fluorescent Eucryptite, Midnight Owl Mine, Independence Gulch, Arizona

Contributed by: Chris Clemens
minID: XK2-5FD
Date: Apr 23rd, 2026
Locality: Midnight Owl Mine, Independence Gulch, White Picacho Mining District, Yavapai County, Arizona, USA (See on Mindat)
Size: 6 x 5 x 8 cm
Weight: 230 g

Description:
Light grey/white eucryptite from the Midnight Owl Mine, Independence Gulch, Yavapai County, Arizona. This is a beautiful specimen under shortwave UV, showing a deep, saturated red fluorescent response. Under midwave UV a dimmer pink/red response is seen. This specimen shows little to no fluorescence under longwave UV.

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
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Pink

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