Database of luminescent Minerals


Chemical Formula: SiO2

Familly: Oxides and hydroxides

Status: IMA-A

Crystal System: Rhomboedric

Mineral for Display: Yes

Associated names (luminescent varieties, discredited names, synonymes etc.):  agateamethystchalcedonyherkimer diamondJasperonyx


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellow Rarely
Mid waves (320 nm):      Yellow Very rarely
Short Waves (254 nm):      Yellow Very rarely
Other colors LW:               
Bluish White , Orangy yellow , Greenish Yellow ,
Other colors MW:               
Bluish White , Orangy yellow , Greenish Yellow ,
Other colors SW:                    
Bluish White , Orangy yellow , Red , Greenish Yellow ,

Long Waves Picture (365nm)

OL (365 nm). Col. G. Barmarin; Photo: G. Barmarin


Galerie de photos:


     To the gallery (35 images in the gallery)

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

UV Type Color Intensity Observation Frequency
Long Wave (365nm): White Very weak
Mid Waves (320 nm): White Very weak
Short Waves (254 nm): White Very weak

Triboluminescence: Yes

Thermoluminescence: Yes

Main Activator(s) and spectrum:

Most Common Activator: (UO2)2+ (Uranyl ion) as impurities

Other activators:            Organic impurities , Fe3+ ,

Peaks in the spectrum (nm):

Fe3+ : 680 nm (Gorobets)

Oil inclusions : 437, 489, 512, 546, 601nm

Quartz from La Sassa, Italy: 500, 520, 555, 595, 666nm

Quartz with "Oil Inclusions".
Excitation: led 370nm. Col. G. Barmarin; Spectre: G. Barmarin


  To the spectrum gallery (1 spectra in the gallery)

Comments on activators and spectra:

Cathodoluminescence: blue or yellow.

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:

Search on Internet:

  Search for images on 'Google Image'

  Search for documents in English on Google

  Search for documents in any languages on Google

  Search on Wikipédia


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.


Quick search by fluorescent mineral name: