Here you can learn about the 4 CC' of the diamonds definitions

Color Grade:

D  E  F  G

Color Less

H  I  J

White

K  L  M

Very Light Yellow

N  O  P  Q  R

Light Yellow

S  T  U  'V  W  X  Y  Z

Yellow

Clarity Grade:

VVS1-VVS2

Very very slightly inclusions

VS1-VS2

Very slightly inclusions

SI1-SI2

Slightly inclusions

I1-I2

Inclusions

Cut Grade:

EXELANT

FAIR

GOOD

PRMIUM

IDEAL