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HK Grading- Know Your Diamonds

Carat Weight
Size Range 0.30 up
CUT
# CUT Grades Description
1 EX Excellent
2 VG Very Good
3 GD Good
4 F Fair
White Inclusion base
Grade Inc.Type Location Size/Des
N(WC0/WT0) White --- None
NV White --- None Visible
WC1 White Crown Minor
WT1 White Table Minor
WC2 White Crown Medium
WT2 White Table Medium
WC3 White Crown Major
WT3 White Crown Major
Fluorescence
FL Grades Parameters
N None Fluroescence
FNT Faint Fluroescence
MED Medium Fluroescence
STG Strong Fluroescence
VST V.Strong Fluroescence
EYE CLEAN BASE
Grade % Description
EC1 75%-100% Sure
EC2 50%-74% Medium
EC3 25%-49% Medium
V 0%-25% Inclusion Visible
ROUGH ORIGIN
Grade Type Description
CM Canada Mark
CME Canada Mark Eligible
FM Forever Mark
FMG Forever Mark Grading
FME Forever Mark Eligible
FMI Forever Mark Inscribed
CLARITY
FL,IF,VVS1,VVS2,VS1,VS2,SI1,SI2,SI3,I1,I2,I3
POLISH
# Polish Grades Description
1 EX Excellent
2 VG Very Good
3 GD Good
4 F Fair
Black Inclusion base
Grade Inc.Type Location Size/Des
N(BC0/BT0) Black --- None
NV Black --- None Visible
BC1 Black Crown Minor
BT1 Black Table Minor
BC2 Black Crown Medium
BT2 Black Table Medium
BC3 Black Crown Major
BT3 Black Crown Major
COLOR SHADE BASE
Grade Color Shade Description
N WH/OF WH/YL --
NV Brown/Gray/Pink None Visible
BRN1 Brown Faint
BRN2 Brown Light
BRN3 Brown Dark
HEART & ARROW BASE
Grade % Description
EX 75%-100% Ex H&A
VG 50%-74% VG H&A
NV 25%-49% None Visible
N 0%-25% None
COLOR
D,E,F,G,H,I,J,K,L,M,N,O-P,Q-R,W-X,Y-Z
SYMMETRY
# Symmetry Grades Description
1 EX Excellent
2 VG Very Good
3 GD Good
4 F Fair
Open Base
Grade Inc.Type Location Size/Des
N(CO0/TO0) Open --- None
NV Open --- None Visible
CO1 Open Crown Minor
TO1 Open Table Minor
CO2 Open Crown Medium
TO2 Open Table Medium
CO3 Open Crown Major
TO3 Open Table Major
MILKY BASE
Grade Inc.Type Size/Des
N(M0) Milky None
NV Milky None Visible
M1 Milky Minor
M2 Milky Medium
M3 Milky Major
LUSTER BASE
Grade Light Perfomance Description
ID Fire & Briliance Ideal
EX Fire & Briliance Ex
VG Fire & Briliance VG
GD Fire & Briliance GD