Luster
Grade |
Description |
AAAA |
Mirror-like reflection with extremely high luster; very bright and highly reflective |
AAA |
Very high luster with strong shine |
AA |
Medium luster with a softer shine |
A |
Low luster with a subdued shine |
Pearl Quality
Quality |
Description |
1 |
Flawless or extremely clean surface with no visible blemishes |
2 |
Very minor or barely noticeable blemishes |
3 |
Minor blemishes |
4 |
Moderately noticeable blemishes |
Shapes
Shapes |
Description |
Round |
Perfectly spherical |
Semi-Round |
Nearly round |
Oval |
Elongated oval shape |
Drop |
Elongated pearl that is narrower at one end |
Button |
Round with one flattened side |
Baroque |
Irregular or free-form shape |
Semi-Baroque |
Slightly irregular shape |
Circle |
Pearl with visible rings or grooves around the surface |
