Fluorescent Mineral Database

A new secret project! Trying to create a nice Fluorescent Mineral Database (FMDB), which would be searchable by mineral, locality, and luminescence properties. Also making it easy for people to contribute with their own specimens!

Hardystonite, Clinohedrite, Willemite – Franklin, New Jersey

Contributed by: Daniel C. Montero
minID: UF7-2JW
Date: May 5th, 2026
Locality: Franklin Mine, Franklin, Sussex County, New Jersey, USA (See on Mindat)
Size: 11 x 8.2 x 13.5 cm

Description:
Hardystonite, Clinohedrite, Willemite.

Under shortwave UV light (254nm) hardystonite is purple blue, clinohedrite is orange, willemite is green.

Originally posted by Daniel C Montero on Nature's Rainbows in 2021.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Hardystonite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
Willemite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green
Clinohedrite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Orange

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