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Issue link: https://digital.miamilivingmagazine.com/i/1319614
STEP 4: GRADING AND QUALITY CONTROL Tiffany operates gemological laboratories in the U.S., Cambodia and Vietnam. We inspect our diamonds at our network of Tiffany Gemological Laboratories in the U.S., Cambodia, and Vietnam. Grading oversight and quality validation occurs in New York, where grading and quality standards are set.