Database of luminescent minerals 

Lapis-lazuli

Chemical formula: See HAUYNE

Family: Rock

Status: NA

Display mineral: NON

Luminescence:

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

No data

Comments:

A metamorphic rock having lazurite as an essential component. The name Lapis Lazuli has been used both to describe the blue mineral previously known as lazurite (but in most cases is actually a Sulphur-rich variety of Hauyne) and the rock that is made up predominantly of this mineral plus calcite, pyrite and other minerals. (mindat.org)

Because lapis is a rock, the fluorescence depends highly of the minerals present and can be very different from sample to sample.

LW: lazurite(?): light blue, calcite: pinkisch.

SW: fluorescence of different minerals from the sodalite group and or afghanite.

Lazurite of Ovalle Chile said to be thermoluminescente and phosphorescente by De Ment (associated calcite?) (see bibliography)

Activator(s) and spectrum:

No spectrum yet

Best localities for fluorescence (*):

• Ladjuar Medam, Sar-e Sang, Koksha Valley, Khash & Kuran Wa Munjan Districts, Badakhshan, Afghanistan;
• Cazadero river, Ovalle, Limarí Province, Coquimbo, Chile (phosphorescent and thermoluminescent cited by de Ment (calcite?));

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

Bibliographic reference for luminescence:

• 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=Lapis-lazuli

  http://webmineral.com/data/Lapis-lazuli.shtml

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