Graders at HRD Antwerp found this one, a HPHT-treated natural diamond inscribed with the report number of an untreated stone.
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8 results for “Grading”
GradingApr 21, 2021A Day in the Life: Zhanna Beissekova, Head Gemologist at IGR London
Beissekova has been dreaming of gemstones since she was a sandbox excavator.
GradingNov 05, 2018State of the Colored Gemstone Market: All Together Now?
The evolution of the lab report in today’s colored gemstone market has led to debate over origin determination, color calls and how labs work together (or don’t).