Pearl Grading
|
Tennyo AAAA |
Hanadama AAA |
AA | A+ | A | |
| Surface | 98% or cleaner pearl surface with either very minor or almost no blemish visible | 98% or cleaner pearl surface with either very minor or almost no blemish visible | Very minor with at least 95% of the pearl surface clean | Minor blemishing with a 85-95% clean surface | Medium blemishing with a 75-85% clean surface |
| Luster | Exceptionally strong (Highest quality in luster) | Very to exceptionally strong | Strong to very strong | Medium | Fair |
| Nacre | Extra thick | Extra thick | Thick | Medium | Thin |
| Shape | Perfectly round （Less than 2.00%） | Perfectly round （Less than 2.00%） | Perfectly round （Less than 3.00%） | Round （Less than 5.00%） | Near round （Less than 12.00%） |