Database of luminescent Minerals

DRAVITE

Chemical Formula: NaMg₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Familly: Silicates

Status: IMA-GP

Crystal System: Rhomboedric

Mineral for Display: No

Luminescence:

Daylight Picture

DRAVITE;
Jajarkot District, Bheri Zone, Nepal
Photo and Copyright:
Middleearthminerals.com
Used with permission of the author

Short Waves Pictures (254nm)

DRAVITE;
Jajarkot District, Bheri Zone, Nepal
UVSW
Photo and Copyright:
Middleearthminerals.com
Used with permission of the author

Galerie de photos:

     To the gallery (8 images in the gallery)

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

Main Activator(s) and spectrum:

Best Locality for luminescence(*):

• Crevola, Italy;
• Moshi, Tanzania;
• Yinniethara, Western Australia, Australia (weak yellow-orange luminescence);
• Kohistan District, Pakistan;
• Jajarkot District, Bheri Zone, Nepal ;
• Pajaru, Jajarkot District, Karnali Pradesh, Nepal;
• Morogoro region of Tanzania (cutted stone moderate to strong yellowish white UV fluorescence);

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

Bibliographical 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 ,
• The World of Fluorescent Minerals, Stuart Schneider, Schiffer Publishing, 2006, ISBN 0-7643-2544-2 ,

Luminescence Reference on internet:

• Yellow brown gem Dravite fluorescence ofMorogoro region of Tanzania, Gems & Gemology, summer 2006, page 183 (picture);

 

Images:

 

• https://www.mindat.org/photo-677492.html
• Pajaru, Nepal: https://www.mindat.org/photo-502925.html

Mineralogical Reference on internet:

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

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

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