Natural Freshwater Pearl Beads Grading Guide
AAAA Grade: Highest luster, reflection and clarity, 99% of pearl surface is clean and smooth, nearly perfect shaped.
AAA Grade: Excellent luster, reflection and clarity, 95% of pearl surface is clean and smooth, excellent shaped.
AA Grade: Very nice luster, reflection and clarity, 86% of pearl surface is clean and smooth, tiny imperfections can be seen if look closely, well shaped.
A Grade: Nice luster, reflection and clarity, 81% of pearl surface is clean and smooth, small imperfections can be seen if look closely, well shaped.
B Grade: Good luster, reflection and clarity, less than 70% of pearl surface is clean and smooth, imperfections, blemishes and irregular shape are visible.
C Grade: Medium luster, reflection and clarity, less than 50% of pearl surface is clean and smooth, imperfections, blemishes and irregular shape are even more visible than grade B.