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GIA HPHT
Undisclosed Green Synthetics Raise GIA Eyebrows
Twenty-five undisclosed lab-grown diamonds have turned up atthe Gemological Institute of America (GIA) — including several with a raregreenish color. The GIA’s lab in Carlsbad, California, recently received thestones — weighing from 0.46 to 0.52 carats — for...
Technology May 26, 2019 Rapaport News
GIA 150
Melee Parcel Contains Just One Natural Stone
The Gemological Institute of America (GIA) found just onenatural diamond in a melee parcel containing more than 1,000 undisclosedsynthetic stones, according to a recent lab note. The organization’s New York center received 1,102 smalldiamonds weighing...
Technology Aug 16, 2018 Rapaport News
alrosa polished diamond jewelry
Alrosa Is Latest to Consider Blockchain
Alrosa is considering implementing blockchain or othertechnology ideas for its rough and polished stones to address challenges withconflict diamonds and undisclosed synthetics, the miner told Rapaport News. “If the industry manages to build a tracing...
Mining Dec 25, 2017 Leah Meirovich
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