Uraninite Uranophane - Ruggles Mine, Grafton, New Hampshire
Contributed by: Mark Cole
Date: Apr 4th, 2026
Locality: Ruggles Mine, Grafton, Grafton County, New Hampshire, USA (See on Mindat)
Description:
Black uraninite is non-fluorescent.
Originally posted by Mark Cole on Nature's Rainbows in 2016.
Summary of luminescence responses:
Uranophane (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green