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Diamond?
Irradiated?
HPHT treated?
Synthetic?
Ruby?
Glass filled ?
Diffused?
Synthetic?
Tables of Gemstone Identification
Revised & Updated Edition 2019
Emerald?
Fracture filled?
Triplet?
Synthetic?
Sapphire?
Heat treated ?
Diffused?
Synthetic?
         A compilation of key information for the gemologist:
           - to analyze the results obtained with all the standard gemological tools
           - to distinguish between natural and treated gemstones, synthesis and imitations
           - to avoid traps and potentially misleading results
 
 
        Overview                    Order now
 
 
 
         Since its first edition in 2002, this chart has become a reference for hundreds of gemologists.
         "...Not all gem charts are created equal, as BLUE CHART'S new incredibly comprehensive and detailed gem ID chart attests..."
            Instore Magazine: The magazine for the American jewelry store owner
 
 
Amber?  

Amber or copal?
Clarity improved ?
Reconstructed?
Gems, Minerals, & Fossils WebRing by s_r_a_inc
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Turquoise?  


Impregnated?
Reconstructed ?
Synthetic?