Sphalerite var. Cleiophane and Willemite - Sterling Hill Mine, Ogdensburg, New Jersey

Contributed by: Bart Pickard
Date: Mar 21st, 2026
Locality: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA (See on Mindat)

Description:
Sphalerite var. Cleiophane and Willemite from the Sterling Hill Mine in Ogdensburg, New Jersey. Shown under longwave, shortwave and white light. Cleiophane is the name given to blue fluorescing sphalerite.

Originally posted by Bart Pickard on Nature's Rainbows in 2016.

Fluorescence under longwave UV light.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Sphalerite (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Blue

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