色澤和瑕疵度的等級 Luster and Surface Flawlessness Grading

Akoya珍珠8mm~10mm之間價格差異最大，而南洋珍珠則在12~18mm之間的價格躍升最大。而Edward Kong South Sea Pearl生產的南洋珍珠大小，直徑大都在10～18mm，色澤分三個主要等級 ~ 金色，香檳色(金黃色)，白色；

u   瑕疵度分級：

(a)     A1級（瑕疵點1點以內,瑕疵不超過5%）

(b)         A2級（瑕疵不超過10%）

(c)          A3級（瑕疵不超過20%）

(d)     B1級（瑕疵不超過30%面積）

(e)     B2級（瑕疵不超過40%面積）

(f)      B3級（瑕疵或超過50%面積）

(g)     C級（其餘）。

Price difference for Akoya pearls between sizes ranged from 8 to 10mm is the biggest. Whereas for South Sea pearls, the biggest price jump is for pearls sized from 12 to 18mm. South Sea pearls produced Edward Kong South Sea Pearl mainly sized from 10 to 18mm with 3 major colour overtones – gold, champagne and white.

u    Flawlessness Grading:

(a)          A1 Grade - Surface flaw does not exceed 5% of the total surface area of a pearl.

(b)         A2 Grade – Surface flaw does not exceed 10% of the total surface area of a pearl.

(c)          A3 Grade – Surface flaw does not exceed 20% of the total surface area of a pearl.

(d)         B1 Grade – Surface flaw does not exceed 30% of the total surface area of a pearl.

(e)          B2 Grade – Surface flaw does not exceed 40% of the total surface area of a pearl.

(f)          B3 Grade – Surface flaw does not exceed 50% of the total surface area of a pearl.

(g)         C Grade – Surface flaw exceeds 50Y% of the total surface area of a pearl.