Database of luminescent Minerals


Chemical Formula: Zn4Be3(SiO4)3S

Familly: Silicates

Status: IMA-GP

Crystal System: Isometric

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Green Weak
Mid waves (320 nm):      Pink Medium
Short Waves (254 nm):      Green Medium
Other colors MW:     
Other colors SW:     
Bluish White ,

Phosphorescence (in the common meaning of the term) seen by naked eye:

UV Type Color Intensity Observation Frequency
Long Wave (365nm): Green Strong
Mid Waves (320 nm): Pink
Short Waves (254 nm): Green Strong


Discovered in Sterling (Franklin, NJ, USA) in 2002 in the Passaic Pit as tiny green fluorescing spots in amphibole.

Mt St Hilaire helvite can be reliably distinguished from genthelvite via its UV response (deep red vs green  (Horvath et al Min Rec 1990 etc.)

Main Activator(s) and spectrum:

Most Common Activator: Fe3+

Other activators:            Mn2+ ,

Peaks in the spectrum (nm):

(?) : Very large band peaking at 720nm with shoulder at 640nm (pink-red luminescence)

No spectrum for the moment

Comments on activators and spectra:

Genthelvite has been studied by steady-state luminescence spectroscopy and Mn2+ was found (Gorobets and Rogojine 2001).

Excitation by CW laser with 532 nm revealed one band peaking at 740 nm which is possibly connected to Fe3+ (Gaft)


Best Locality for luminescence(*):

(*)Data are not exhaustive and are limited to the most important localities for fluorescence

Bibliographical Reference for luminescence:

Luminescence Reference on internet:

Mineralogical Reference on internet:

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Note: While all due attention has been paid to the implementation of the database, it may contain errors and/or accidental omissions. By nature, the database will always be incomplete because science always evolves according to new analysis.
A request providing no result means only that no such reference exists in the database, but it does not mean that what you are looking for does not exist, just not to our knowledge. If you think you have found an error or omission, please let us know via the contact page being sure to cite the source of information.


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