Gemmological Spectroscopy                                                                                                                                                                                  


          NEWS An update on the latest additions or alterations to this site.

          PHOTOGRAPHY How the images were captured on camera.

          SPECTRA DATABASE Images and Descriptions of Absorption and Emission Spectra.

            COLOUR FILTERS The application of colour filters in gem testing.

          THROUGH MY SPECTROSCOPE Spectra of special interest  presented and discussed

          ABOUT THE AUTHOR John S. Harris Engraver and Gemmologist.


          A GUIDE TO THE SPECTROSCOPE          A Gemlab UK Production for Education in Gemmological Spectroscopy.     


This CD contains an animated Microsoft PowerPoint Slide Show which can be controlled by the viewer.

                              For further information on contents and to order click the image





Gemmology Resources 

The Gemmological Association of Great Britain

The Scottish Gemmological Association

Optical Spectroscopy Software by Dr. F. Menges 

Unique Original Jewellery by Richard Harris




The images and text shown on this web site are the sole intellectual property of John S. Harris. and may not be copied, transmitted, or used in any way without permission.

Permission may be granted for non-commercial use in education and research in which case please

apply to John Harris at



Copyright John S. Harris - from the year 2000 to the current date.