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GIA Grades Synthetic Diamond with Blue Band

Summary by rapaport.com
The Gemological Institute of America (GIA) recently examined a 1.09-carat diamond grown by chemical vapor deposition (CVD) that displayed a blue band.  A customer recently submitted the D-color synthetic diamond to the GIA’s laboratory in Mumbai. The coloring was likely a result of uncompensated boron concentration, according to an article in the Spring issue of Gems & Gemology, the institute’s quarterly journal.   Boron doesn’t often cause blue…
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rapaport.com broke the news in on Tuesday, June 10, 2025.
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