Database of luminescent Minerals


Chemical Formula:See QUARTZ

Familly: Oxides and hydroxides

Status: NON APPR

Crystal System: Polycrystalline

Mineral for Display: Yes

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


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Green
Short Waves (254 nm):      Yellowish White
Other colors LW:                    
Bluish White , Yellowish White , Pale Yellow , Yellowish ,
Other colors SW:                         
Yellowish White , Pale Yellow , Green , Greenish , Greenish white ,

Daylight Picture


Photo and Copyright: Bill Barr
Used with permission of the author;

Short Waves Pictures (254nm)

agate under SWUV

Photo and Copyright: Bill Barr
Used with permission of the author;


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

No Data


Siam agate: variety of chalcedony fluo green SW also called  or chapinite, a mixture of agate and jasper.

Main Activator(s) and spectrum:

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

Peaks in the spectrum (nm):

(UO2)2+ : 502,7, 521,5, 544, 566, 593nm 

Col. G. Barmarin; Spectre: G. Barmarin

Comments on activators and spectra:

Typical spectrum linked to the presence of uranium ions.

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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