Mystery Diamond Color Treatment Stumps GIA

As many as 500 diamonds may have been subjected to a new mystery color treatment that temporarily improves their color as much as three grades, the Gemological Institute of America reported yesterday.

GIA believes that the treatment temporarily masks diamond’s body color, resulting in a color grade that can be up to three grades higher than it would be normally.

The Gemological Institute of America says that as many as 500 diamonds may have been subjected to a new mystery color treatment that temporarily improved the stones’ color as much as three grades.

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JCK Staff

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