Grading System
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 ( with close inspection can be veiwed thr naked eye)
T3 PROMINENT INCLUSION ON TABLE OR IN CENTRE(Veiwable thr naked eye)
T4 MAJOR INCLUSION ON TABLE OR IN CENTRE(Veiwable thr naked eye)
BLACK INCLUSION
B0 NO BLACK INCLUSION
B1 PINPOINT BLACK (small dotted black/minor)
B2 MINOR/MED BLACK INCLUSION
B3 MED/VISIBLE BLACK INCLUSION (Veiwable by naked eye without loupe) NOT EYECLEAN
B4 PROMINENT BLACK ( Veiwable by naked eye without loupe) NOT EYECLEAN
OPEN INCLUSION
00 NO OPEN INCLUSION
01 HAIR LINE OPEN INCLUSION
02 SMALL OPEN INCLUSION
03 MEDIUM OPEN INCLUSION
04 HEAVY OPEN INCLUSION
NATURAL INCLUSION
N0 NO NATURALS
N1 NEGLIGIBLE SMALL NATURAL
N2 SMALL NATURAL
N3 MEDIUM NATURAL
N4 HEAVY NATURAL
MILKY
M0 NO MILKY
M1 SLIGHTLY MILKY
M2 MEDIUM MILKY
M3 PROMINENT MILKY
M4 HEAVY MILKY
CULET
C0 NONE CULET
C1 VERY SMALL CULET
C2 SMALL CULET
C3 MEDIUM CULET
C4 BIG CULET
TINT
NON NO BROWN OR GREEN TINT
TLB VERY SLIGHT BROWN TINT OR GREEN TINT
LB LIGHT BROWN TINT OR GREEN TINT
B BROWN TINT OR GREEN TINT
H & A
NON NO FORMATION OF HEARTS & ARROWS
VG VG FORMATION OF HEARTS & ARROWS
EX EX FORMATION OF HEARTS & ARROWS
EYECLEAN
YES INCLUSION NOT VEIWED BY NAKED EYE
NO INCLUSION VEIWABLE BY NAKED EYE (Without loupe)