Pearl Grading Explained: AAA Letters, GIA’s 7 Factors and Tahiti’s A-D
Pearl grading has no single universal scale. A seller’s AAA means whatever that seller says it means, GIA describes pearls by seven value factors, and French Polynesia sorts Tahitian pearls from Top Gem down to D. Here is how each system works, what the FTC requires on labels, and which lab report to ask for.