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!

Scheelite, Powellite, Hyalite Opal - Arizona

Contributed by: Mark Cole
Date: Mar 15th, 2026
Locality: OK Mine, Johnson Camp, Gunnison Copper Project, Cochise Mining District, Cochise County, Arizona, USA (See on Mindat)

Description:
The opal matrix on this piece has an interesting shift to the blue end of the spectrum under midwave UV.

Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under midwave UV light.
Fluorescence under midwave UV light.

Summary of luminescence responses:

Opal-AN (Mindat) (RRUFF)

  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green
Powellite (Mindat) (RRUFF)
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Yellow

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