Database of luminescent Minerals


Chemical Formula: NaCa2Si3O8(OH)

Familly: Silicates

Status: IMA-GP

Crystal System: Triclinic

Mineral for Display: No

Associated names (luminescent varieties, discredited names, synonymes etc.):  pecto-prehnite


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Yellowish White Strong
Mid waves (320 nm):      Pink Medium
Short Waves (254 nm):      Orange Medium
Other colors LW:                                                  
White , Bluish White , Yellowish White , Pinkish White , Pale Yellow , Orangy yellow , Orange , Dark Orange /Tawn , Greenish white , Yellowish ,
Other colors SW:                                             
Bluish White , Yellowish White , Pale Yellow , Orangy yellow , Orange , Dark Orange /Tawn , Violet red , Violet Pink , Greenish white ,

Daylight Picture

Photo and Copyright: James Hamblen
Site of the author
Used with permission of the author

Short Waves Pictures (254nm)

Photo and Copyright: James Hamblen
Site of the author
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:

No Data

Triboluminescence: Yes

Thermoluminescence: Yes


Luminescence of pectolite was noted in 1903 by Kunz and Baskerville.

In Mt-St-Hilaire, Pectolite could be confused with Makatite. The major distinguishing feature is the fluorescence. While not all makatite fluoreseces, when it does it is moderate to strong blueish white or very pale greenish SW (and sometimes LW as well). This specimen fluoresces a weak pinkish LW – typical of MSH pectolite. (see in bibliography).

Main Activator(s) and spectrum:

Most Common Activator: Mn2+

Peaks in the spectrum (nm):

Mn2+ replacing Ca2+580-610nm 

Spectrum: Michael Gaft, Petah Tikva, Israel. Plot: Institute of Mineralogy, University of Vienna, Austria, with permission of the authors.

Comments on activators and spectra:

Activator: probably Mn2+ substituting to Ca2+ (see Gorobets)

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:

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