Diamonds
Carat
Size Range 0.30 up
Clarity
LC,FL,IF,VVS1,VVS2,VS1,VS2,SI1,SI2,SI3,I1,I2,I3,I4
COLOR
D,E,F,G,H,I,J,K,L,M,N,O-P,Q-R,S-T,U-V,W-X,Y-Z,FANCY
D, E, F, G, H, I, J, K, L, M, N, O-P, Q-R, W-X, Y-Z
Cut
#
CUT Grades
Description
1
EX
Excellent
2
VG
Very Good
3
GD
Good
4
F
Fair
POLISH
#
Polish
Description
1
EX
Excellent
2
VG
Very Good
3
GD
Good
4
F
Fair
SYMMETRY
#
Symmetry
Description
1
EX
Excellent
2
VG
Very Good
3
GD
Good
4
F
Fair
WHITE INCLUSION BASE
Grade
Inc. Type
Location
Size/Desc
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
BLACK INCLUSION BASE
Grade
Inc. Type
Location
Size/Desc
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
OPEN BASE
Grade
Inc. Type
Location
Size/Desc
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
Crown
Major
FLOURESENCE
FL Grades
Parameters
N
None Fluroescence
FNT
Faint Fluroescence
MED
Medium Fluroescence
STG
Strong Fluroescence
VST
Very Strong Fluroescence
COLOR SHADE
Grade
Color Shade
Description
N
WH/OF WH/YL
--
NV
Brown/Gray /Pink
None Visible
BRN1
Brown
Faint
BRN2
Brown
Light
BRN3
Brown
Dark
Milky
Grade
Inc. Type
Size/Desc
N(M0)
Milky
None
NV
Milky
None Visible
M1
Milky
Minor
M2
Milky
Medium
M3
Milky
Major
EYE CLEAN
Grade
%
Description
EC1
75%-100%
Sure
EC2
50%-74%
Medium
EC3
25% - 49%
Medium
V
0%-25%
Inclusion Visible
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
Lab
Grades
Description
GIA
Gemological Institute of America
IGI
International Gemological Institute
HRD
Hoge Raad voor Diamant
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