The 5 S's of Pearl Valuation

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  • 7 mm
    Small
  • 10 mm
     
  • 12 mm
    Medium
  • 15 mm
     
  • 20 mm
    Large

Tahitian pearls range from 7mm to 20mm. Pearls greater than 12mm are exceptional because they are rare and more difficult to culture. However size alone is not a sufficient guide to evaluating a pearl since it is an intricate combination of factors that determines a pearls’ beauty and quality.