Grading System

Center Natts
CN0 No Center Black Inclusion
CN1 Minor Center Black Inclusion
CN2 Medium Center Black Inclusion
CN3 Major Center Black Inclusion
SIDE NATTS
SN0 No Side Black Inclusion
SN1 Minor Side Black Inclusion
SN2 Medium Side Black Inclusion
SN3 Major Side Black Inclusion
CENTER FEATHER
CW0 No Center White Inclusion
CW1 Minor Center White Inclusion
CW2 Medium Center White Inclusion
CW3 Major Center White Inclusion
SIDE FEATHER
SW0 No Side White Inclusion
SW1 Minor Side White Inclusion
SW2 Medium Side White Inclusion
SW3 Major Side White Inclusion
H&A
EX Excellent Hearts & Arrow
VG Very Good Hearts & Arrow
GD Good Hearts & Arrow
NO No Hearts & Arrow
MILKY
ML0 No Milky
ML1 Slightly Milky
ML2 Medium Milky
ML3 Prominent Milky
TABLE INCLUSION
T0 No Inclusion On Table Or In Centre
T1 Minor Inclusion On Table Or In Centre
T2 Medium Inclusion On Table Or In Centre (visible by naked eye on close inspection)
T3 Prominent Inclusion On Table Or In Centre (visible by naked eye)
T4 Major Inclusion On Table Or In Centre (visible by naked eye)
BLACK INCLUSION
B0 No Black Inclusion
B1 Black Pinpoint (small dotted black/minor)
B2 Minor/Medium Black Inclusion
B3 Medium/Visible Black Inclusion (visible by naked eye without loupe) NOT EYECLEAN
B4 Prominent Black (visible by naked eye without loupe) NOT EYECLEAN
OPEN INCLUSION
00 No Open Inclusion
O1 Hair Line Open Inclusion
O2 Small Open Inclusion
O3 Small Open Inclusion
O4 Heavy Open Inclusion
NATURAL INCLUSION
N0 No Naturals
N1 Negligibly Small Natural
N2 Small Natural
N3 Medium Natural
N4 Heavy Natural
TINGE
N0N No Brown Or Green Tinge
TLB Very Slight Brown Tinge Or Green Tinge
LB Light Brown Tinge Or Green Tinge
B Brown Tinge Or Green Tinge
CULET
N0NE None Culet
VSM Very Small Culet
SML Small Culet
MED Medium Culet
HEAVY Big Culet
EYECLEAN
YES Inclusion Not Visible By Naked Eye
NO Inclusion visible By Naked Eye (Without loupe)