Size: all measurements in millimeters (mm)

Shape: round, near round, oval, button, drop, semi-baroque and baroque

Color: a combination of the dominant body color, overtone and orientation

Luster: the intensity of light reflected from the surface of the pearl

Surface Quality: the presence of blemishes confined to the surface of the pearl

Nacre Quality: noted thickness and texture of the pearl covering

Matching: the uniformity of appearance in multi-pearl pieces