Database of luminescent minerals 

agate

Chemical formula: See QUARTZ

Family: Oxides and hydroxides

Status: NON APPR

Crystal system : Polycrystalline

Display mineral: OUI

Associated names (luminescent varieties, discredited names, synonyms, etc.): chapinite, 

Luminescence:

Daylight picture

agate

Photo and Copyright: Bill Barr
Used with permission of the author;

Shortwave (254nm) picture

agate under SWUV

Photo and Copyright: Bill Barr
Used with permission of the author;

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

No data

Comments:

Siam agate: variety of chalcedony fluo green SW also called  or chapinite, a mixture of agate and jasper.

Activator(s) and spectrum:

Activator(s): (UO₂)²⁺ (ion Uranyle) en impureté,

Peaks in the spectrum (nm):

(UO₂)²⁺ : 502,7, 521,5, 544, 566, 593nm 

Col. G. Barmarin; Spectre: G. Barmarin

Comments on spectrum and activators:

Typical spectrum linked to the presence of uranium ions.

Best localities for fluorescence (*):

• Graham County, Arizona, USA (Fire agate, green SW);
• Sierra Santa Lucia, Ejido Benito Juarez, Mun. de Ahumada, Chihuahua, Mexico (green SW);
• Ojo Laguna, Ahumada, Chihuahua, Mexico (green SW);
• Barstow, CA, USA ( Siam agate fluo green SW, a mixture of agate and jasper);
• Cubuk, Ankara Province, Central Anatolia Region, Turkey (LW green, orange or white);

(*)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 ,
• Luminescence Spectroscopy of Minerals and Materials, M. Gaft, R. Reisfeld, G. Panczer, Springer Editor, ISBN: 10 3-540-21918-8 ,

Reference for luminescence on the Internet:

Mineralogical reference on the Internet:

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

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

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