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RAPAPORT… The Gemological Institute of America (GIA) doesn’t usually
declare itself stumped, but a recent discovery of a flaw in a synthetic diamond
that’s almost always associated with natural stones left scientists scratching
their heads.
Gemologists studying a round, brilliant-cut, 0.26-carat,
pink laboratory-grown diamond found a surprising “H4 defect” — a common
characteristic of natu…

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