Esperite from the Franklin Mine, NJ, USA

Contributed by: Howie Green
Date: Dec 17th, 2024
Locality: Franklin Mine, Franklin, Sussex County, New Jersey, USA (See on Mindat)

Description:
Esperite (yelllow), hardystonite (blue), and willemite (green) fluorescence under shortwave UV light.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Esperite (Mindat) (RRUFF)

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

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

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