Mineral Fluorescence Under Blue Light

The geology community knows a lot about mineral fluorescence under excitation by various wavelengths of ultraviolet light but when it comes to excitation by light in the visible portion of the spectrum, such as blue, … not so much. In December 2013 Charles Mazel (NIGHTSEA) and Earl Verbeek (Sterling Hill Mining Museum) explored the extensive collection of the Franklin Mineral Museum (Franklin, New Jersey, USA) for instances of blue-light-stimulated fluorescence. When fluorescence occurred the specimen was photographed under white light,  fluorescing under blue light, and fluorescing under either or both of shortwave and longwave ultraviolet light. The results were published in September 2014 – Mazel, C.H. and Verbeek, E.R. (2014), Fluorescence of minerals under blue light. The Picking Table (Journal of the Franklin-Ogdensburg Mineralogical Society), vol. 55, no. 2, p. 13-25.

Picking Table


The editors of The Picking Table have graciously allowed us to make the fall 2014 issue with our article on blue light mineral fluorescence available for free download. And we certainly encourage you to join FOMS so that you can keep up with their activities and receive future issues.


We are sharing the photographic results in a series of blog posts, each documenting one specimen. This page summarizes the posts that have been made to date. Click any image to go to that page for that mineral

Bustamite fluorescing under blue light


Charlesite and clinohedrite fluorescing under shortwave ultraviolet light

Charlesite / Clinohedrite

Clinohedrite fluorescing under blue light


Esperite fluorescing under shortwave ultraviolet light


Fluorapatite fluorescing under shortwave ultraviolet light


Gypsum fluorescing under blue light


Hardystonite fluorescing under shortwave ultraviolet light


Hedyphane fluorescing under blue light


Hemimorphite fluorescing under blue light


Hodgkinsonite fluorescing under blue light


Hydrozincite fluorescing under longwave ultraviolet light


Johannsenite fluorescing under blue light


Meionite fluorescing under shortwave ultraviolet light


Norbergite and ruby fluorescing under blue light (detail)

Norbergite and Ruby

Prehnite and pectolite fluorescing under shortwave ultraviolet light

Prehnite and Pectolite

Quartz fluorescing under blue light


Roeblingite fluorescing under blue light


Xonotlite and roeblingite fluorescing under blue light

Xonotlite and Roeblingite