Pearl Grading | Akoya Pearls Grading | South Sea Pearls Grading | Tahitian Pearls Grading | Freshwater Pearls Grading | Shecy Pearls

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Pearl Grading System

Freshwater Pearls Grading

Grading	Round	Off-round	Drop	Baroque	Button
AAA	luster : Highest ; Blemish : 95% - 100% Free ; Smoothness : Very Good ; Nacre : Thick ;			N/A
AA+	luster : Very High ; Blemish : 90% - 95% Free ; Smoothness : Very Good ; Nacre : Thick ;
AA	luster : High ; Blemish : 75% - 90% Free ; Smoothness : Good ; Nacre : Medium to Thick ;
A+	luster : Good ; Blemish : Good ; Smoothness : Good ; Nacre : Thin to Medium ;
A	luster : Good ; Blemish : Good ; Smoothness : Good ; Nacre : Thin to Medium ;

Akoya Pearls Grading:

Grading	Round
AAA	luster : Highest ; Blemish : 95% - 98% Free ; Smoothness : Very Good ; Nacre : Thick ;
AA+	luster : Very High ; Blemish : 90% - 95% Free ; Smoothness : Very Good ; Nacre : Thick ;
AA	luster : High ; Blemish : 75% - 90% Free ; Smoothness : Good ; Nacre : Medium to Thick ;
A+	luster : Good ; Blemish : Good ; Smoothness : Good ; Nacre : Thin to Medium ;
A	luster : Good ; Blemish : Good ; Smoothness : Good ; Nacre : Thin to Medium ;

South Sea Pearls Grading:

Grading	Round
AAA	luster : Highest ; Blemish : 98% - 100% Free ; Smoothness : Very Good ; Nacre : Very Thick ;
AA+	luster : Very High ; Blemish : 90% - 98% Free ; Smoothness : Very Good ; Nacre : Thick ;
AA	luster : High to Very High ; Blemish : 80% - 90% Free ; Smoothness : Good ; Nacre : Thick ;
A+	luster : High ; Blemish : 70% - 80% Free ; Smoothness : Good ; Nacre : Medium to Thick ;
A	luster : Good ; Blemish : 40% - 70% Free ; Smoothness : Moderate ; Nacre : Thin to Medium ;

Tahitian Pearls Grading:

Grading	Round / Cirecle Drop
AAA	luster : Highest ; Blemish : 98% - 100% Free ; Smoothness : Very Good ; Nacre : Very Thick ;
AA+	luster : Very High ; Blemish : 90% - 98% Free ; Smoothness : Very Good ; Nacre : Thick ;
AA	luster : High to Very High ; Blemish : 80% - 90% Free ; Smoothness : Good ; Nacre : Thick ;
A+	luster : High ; Blemish : 70% - 80% Free ; Smoothness : Good ; Nacre : Medium to Thick ;
A	luster : Good ; Blemish : 40% - 70% Free ; Smoothness : Moderate ; Nacre : Thin to Medium ;

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