Akoya pearls were the first spherical cultured pearls, introduced early in the twentieth century. The Akoya oyster's scientific name Pinctada Fucata, are smaller than other pearl oysters, saltwater pearls produced in Japan and China.
Luster: High to Medium, Pearl Grade: AA or AAA
The Luster of the pearl refers to its ability to retract and reflect light from its translucent layers.
Judge the luster by the brightness and sharpness of the reflected light. The brighter and sharper the reflections are, the higher the grade will be.
Surface quality is the condition of the pearl’s surface. Consider the visibility and type of surface characteristics present. Is the surface clear, or does it have some slight flaws in it? The clearer it appears the higher the grade given.