Powellite from the Granite Pass Tungsten Mine, Little Hatchet Mts, New Mexico
Contributed by: FMS Admin
Date: Mar 14th, 2026
Locality: Granite Pass tungsten prospect, Sylvanite Mining District, Hidalgo County, New Mexico, USA (See on Mindat)
Description:
Originally posted by Paul Garland on Nature's Rainbows.
Summary of luminescence responses:
Powellite (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow

