Database of luminescent Minerals

amethyst

NOT FLUORESCENT but cited by some authors

Chemical Formula:See QUARTZ

Familly: Oxides and hydroxides

Status: NR

Crystal System: Rhomboedric

Mineral for Display: No

Luminescence:

Daylight Picture

Amethyste,
Kedon, Magadanskaya Oblast, Far-Eastern Region, Russia;
Col. G.Barmarin; Photo: G. Barmarin

Short Waves Pictures (254nm)

Amethyste, UVSW
Kedon, Magadanskaya Oblast, Far-Eastern Region, Russia;
Col. G.Barmarin; Photo: G. Barmarin

Galerie de photos:

     To the gallery (7 images in the gallery)

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

Comments:

You can sometime find amethyst crystal covered by an invisible coating of hyalite fluorescing in green under SW. It looks like it is the amethyst crystal itself which is luminescent but it is the hyalite.

Main Activator(s) and spectrum:

Most Common Activator: (UO₂)²⁺ (Uranyl ion) as impurities

Peaks in the spectrum (nm):

UO₂²⁺ (hyalite coating) : Broad band (120nm) peaking at 514 and 550nm, (493), (594)

Comments on activators and spectra:

Broad band with max at 514nm and 550nm and shoulder at 493 and 594nm; the max are in correlation with the peaks of hyalite spectrum taken from other part of the rock.

Best Locality for luminescence(*):

• Kedon, Magadanskaya Oblast, Far-Eastern Region, Russia;

(*)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 ,

Mineralogical Reference on internet:

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

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

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