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!

Snakeskin Agate - Rome, Malheur County, Oregon

Contributed by: FMS Admin
Date: May 7th, 2026
Locality: Rome, Malheur County, Oregon, USA (See on Mindat)
Size: 2 inches

Description:
Snakeskin agate is known for the peculiar scaly appearance of the outside of the rocks. Unfortunately, this one is a poor example of the scales, so no daylight image of them, just the face. Instead, we have a nice, bright green, fluorescent face that glows across all wavelengths. The green is most likely from entrapped uranyl ions within the material. Shown under SW (all wavelengths have similar responses).

Originally posted by Fire Viper on Nature's Rainbows in 2018.

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

Summary of luminescence responses:

Chalcedony (Mindat) (RRUFF)

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

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