Barite on Dolomite Matrix, Phosphorescent - Cerro Warihuyn, Huanuco, Peru

Contributed by: Mark Cole
Date: Apr 2nd, 2026
Locality: Cerro Warihuyn (Huarihuyn; Huarihuayin), Miraflores District, Huamalíes Province, Huánuco, Peru (See on Mindat)

Description:
Originally posted by Mark Cole on Nature's Rainbows in 2016.

Fluorescence under shortwave UV light.

Afterglow after exposure to shortwave UV light.

Normal light.

Summary of luminescence responses:

Baryte (Mindat) (RRUFF)

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
• Afterglow after exposure to Shortwave (254nm Lamp/Mercury) UV light: Green