Database of luminescent Minerals


Chemical Formula: (Al,Fe3+)7(SiO4)3(BO3)O3

Familly: Silicates

Status: IMA-GP

Crystal System: Orthorhombic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellowish White
Short Waves (254 nm):      Bluish White Medium
Other colors LW:     
Red ,

Daylight Picture

Dumortierite, Dehesa, California, USA.

Photo and Copyright: Gérard Barmarin.

Short Waves Pictures (254nm)

Dumortierite, UVSW, Dehesa, California, USA.

Photo and Copyright: Gérard Barmarin.


Galerie de photos:


     To the gallery (2 images in the gallery)

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

No phosphorescence seen by naked eye whatever the type of UV

Main Activator(s) and spectrum:

Most Common Activator: TiO6

Other activators:            Cr3+ ,

Peaks in the spectrum (nm):

TiO6 replacing AlVI3+ : Large band peaking at 460 nm
Cr3+ replacing AlVI3+ "R-Lines": 680, 688 nm (Gorobets)
455, 487, 508, 525 and 545nm

Col. G. Barmarin; Spectre: G. Barmarin

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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