Database of luminescent Minerals


Chemical Formula: Na2Si4O8(OH)2 4H2O

Familly: Silicates

Status: IMA-A

Crystal System: Monoclinic

Mineral for Display: No


UV Type Main color Intensity Observation Frequency
Long Waves (365nm):      Bluish White Medium
Mid waves (320 nm):      Bluish White Medium
Short Waves (254 nm):      Bluish White Medium
Other colors LW:     
Yellowish White ,
Other colors MW:          
Yellowish White , Greenish ,
Other colors SW:     
Yellowish White ,

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

UV Type Color Intensity Observation Frequency
Long Wave (365nm): White Weak
Mid Waves (320 nm): White Weak
Short Waves (254 nm): White Weak


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:

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:

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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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