Database of luminescent Minerals


pearl


Chemical Formula:See ARAGONITE

Familly: Organic

Status: NR

Mineral for Display: No


Luminescence:


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellowish White
Mid waves (320 nm):      Bluish White
Short Waves (254 nm):      Bluish White
Other colors LW:               
Bluish White , Violet Pink , Salmon pink ,
 

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


No Data

Comments:


The mother-of-pearl is formed from aragonite mixed with conchylin.

 

Some non-pearly brown, gray or black pearls like the famous 'Hope' pearl have an orange-red fluorescence (see bibliography: The Journal ot Gemmology, vol. 26-1, 1998).

 

The peculiarity of Pteria Sterna pearls from the Sea of ​​Cortez and of the mother-of-pearl of their shell is the pink-red fluorescence due to porphyrin under ultraviolet radiation at 365 nm (UVL). They are inert under short wavelength ultraviolet radiation (254 nm, UVC). (see bibliography: paper of 'Laboratoire français de gemmologie')


Main Activator(s) and spectrum:


No data


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:


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

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

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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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