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!

Roeblingite from the Frankin Mine, NJ, USA

Contributed by: Simone Conti
minID: HC3-FEM
Date: Dec 01st, 2024
Locality: Franklin Mine, Franklin, Sussex County, New Jersey, USA (See on Mindat)
Size: 1.5 x 1.2 x 1.5 x cm
Weight: 2.6 g

Description:
A little nodule of roeblingite, showing its classical coconut-flesh appearance. Fluorescent orange/red under shortwave UV light. The roeblingite is surrounded by grains of, presumably, prehnite, fluorescent violet under shortwave UV, possibly mixed with other minerals. The “prehnite” also fluoresces white under midwave and longwave UV, with white afterglow. The label also lists hancockite, the reddish mineral in daylight. A tiny thumbnail roeblingite specimen, but very characteristic.

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

Summary of luminescence responses:

Roeblingite

  • Fluorescence under Shortwave (255nm LED) UV light: Orange
Prehnite
  • Fluorescence under Shortwave (255nm LED) UV light: Violet

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