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Diamond Check and Grading Codes

Grading Codes for Diamonds

D * Blue White
E * Ice White
F * Fine White
G * White
H * Top Commercial White
I-J * Commercial White
K-L * Top Silver Cape
M-O * Silver Cape
P-R * Light Cape
S-U * Cape
V-Z * Dark Cape

Meaning of Flaws

WS1 Minute inclusions – extremely difficult to see at 10x
VVS2 Minute inclusions – very difficult to see at 10x
VS1 Minute inclusions – difficult to see face-up at 10x
VS2 Minute inclusions – somewhat easy to see face-up at 10x
SI1 Noticeable inclusions – easy to see at 10x
SI2 Noticeable inclusions – very easy to see at 10x
I1 Obvious inclusion at 10x – visible to unaided eye
I2 Obvious inclusion – visible to unaided eye
I3 Prominent inclusions – extremely easy to see with unaided eye

The 4 C’s

The 4 C’s and the style of the engagement ring should be considered in close harmony. The type of setting of the ring should maximise the beauty of the diamond you have selected: while the 4 C’s of the diamond should compliment the design you have chosen.

CUT – This comprises both the shape and proportions of the stone that the diamond polisher has been able to unveil. While the ‘Round Brilliant’ cut yields a diamond of symmetric proportions, fancier shapes might prove more suitable to your taste.
COLOUR – The colour of the diamond you choose may be influenced by the colour of the metal in the design of your ring. The average ranges from colourless through to dark yellow. Other colours such as red, blue and green are more rare.
CLARITY – Also referred to as the ‘purity’ of a diamond, is graded under x10 magnification according to universal standards. A flawless diamond will command a higher price than that of one with blemishes and inclusions.
CARAT WEIGHT– This indicates the size or weight of the diamond. The design of the ring and finger size of the wearer will be of importance when determined the carat weight of choice.


Courtesy of Claudia Liebenberg