GEM / Exceptional(9-10) (C5_4_6)

AAA / EX. FINE(8-9) (C5_3_5)

AA / FINE(6-8) (C6_3_4)

A / GOOD(4-6) (C6_3_3)

B / Commercial(3-4) (C6_4_2)

C / Lower Commercial(1-3) (C6_3_1)