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.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Powellite (Mindat) (RRUFF)

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