Database of luminescent minerals 

DUMORTIERITE

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

Family: Silicates

Status: IMA-GP

Crystal system : Orthorhombic

Display mineral: NON

Luminescence:

Daylight picture

Dumortierite, Dehesa, California, USA.

Photo and Copyright: Gérard Barmarin.

Shortwave (254nm) picture

Dumortierite, UVSW, Dehesa, California, USA.

Photo and Copyright: Gérard Barmarin.

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Phosphorescence (in the common sense of the term) observable with the naked eye:

No phosphorescence visible to the naked eye under any type of UV

Activator(s) and spectrum:

Activator(s): TiO₆, Cr³⁺,  

Peaks in the spectrum (nm):

TiO₆ replacing Al_VI³⁺ : Large band peaking at 460 nm
Cr³⁺ replacing Al_VI³⁺ "R-Lines": 680, 688 nm (Gorobets)
455, 487, 508, 525 and 545nm

Col. G. Barmarin; Spectre: G. Barmarin

Best localities for fluorescence (*):

• Magadanskaya Oblast, Far-Eastern Region (Siberia), Russia;
• Dehesa Dumortierite deposit, Alpine, Laguna Mts, San Diego Co., California, USA;
• Vaca Morta quarry, Serra da Vereda, Boquira, Bahia, Brazil;

(*)The data are not exhaustive and are limited to a few remarkable localities for fluorescence

Bibliographic reference for luminescence:

• The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,
• Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
• Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

  http://www.mindat.org/show.php?name=Dumortierite

  http://webmineral.com/data/Dumortierite.shtml

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