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 SPECTRA                                 

     GEMSTONE   COMPARISON DATABASE  

These are the first sections to be uploaded and additional gems will be inserted in them as they are processed.

COLOURLESS STONES      CS1                                                  

 RED STONES    RD1  Dark red

                          RD2  Pinkish red

                           RD3 Orangey red  

           RD4 Slightly purplish red

                       RD5  Purplish red

    SPECTRA OF PRINCIPAL GEMSTONES

Other pages are under construction.

ALEXANDRITE

ALMANDINE GARNET

EMERALD

PERIDOT

RUBY

RED SPINEL

SAPPHIRE

ZIRCON (High type)

ZIRCON (low type)

Gemlab. UK  
Gemmological Association of Great Britain Registered Tutor

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Jewellers and Gemmologists
4 The Crescent Carlisle, Cumbria U. K., CA1 1QN
Tele. +44(0)1228 528334

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EDUCATION IN GEMS AND  GEMMOLOGY

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                                                     SPECTRA                                                

   Images and Descriptions of Absorption and Emission Spectra
by
John S. Harris F.G.A.

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 The images and text shown on this web site are the sole intellectual property of John S. Harris.

They must not be copied, transmitted, or used in any way without permission. This may be granted for education purposes in which case please apply to John Harris.

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Links

Gemmological Association of Great Britain Scottish Branch - www.scotgem.demon.co.uk

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Copyright John S. Harris 2000-2009