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Complete Guide on Diamond GradesUpdated 3 months ago

The 4 C's of Diamonds—Cut, Clarity, Color, and Carat Weight—are crucial for every diamond purchase. Explore our comprehensive guide to understand the various tiers of diamond grades.


Cut Grades

GradeDescription
ExcellentReflects nearly all of the light that enters the diamond, providing maximum brilliance and fire. Usually has a very precise cut.
Very GoodReflects most of the light that enters. Cut is better than average, yielding high brilliance and fire.
GoodReflects a good amount of light, with much brilliance and fire, but less precision in cut compared to higher grades.
FairAllows light to escape from the sides and bottom, reducing perceived brilliance and fire. Cut is not as precise.
PoorAllows most of the light to escape from the bottom and sides. Cut quality is low, resulting in dull brilliance.


Clarity Grades

GradeDescription
FLFlawless: No inclusions or blemishes visible under 10x magnification.
IFInternally Flawless: No inclusions, only blemishes visible under 10x magnification.
VVS1Very Very Slightly Included (1): Inclusions are very difficult to see under 10x magnification.
VVS2Very Very Slightly Included (2): Inclusions are very difficult to see, slightly more than VVS1.
VS1Very Slightly Included (1): Inclusions are minor and observed with effort under 10x magnification.
VS2Very Slightly Included (2): Inclusions are minor and include more or larger than VS1.
SI1Slightly Included (1): Inclusions are noticeable under 10x magnification.
SI2Slightly Included (2): Inclusions are more noticeable than SI1.
I1Included (1): Inclusions are obvious under 10x magnification and may affect transparency and brilliance.
I2Included (2): Inclusions are very obvious, more so than I1, affecting appearance and brilliance.
I3Included (3): Inclusions are extremely obvious, severely affecting the diamond's transparency and brilliance.


Color Grades

GradeDescription
DAbsolutely colorless. The highest color grade, which is extremely rare.
EColorless. Only minute traces of color can be detected by an expert gemologist, but are generally unnoticeable.
FColorless. Slight color detected by an expert gemologist, but still considered colorless.
GNear-colorless. Color noticeable when compared to diamonds of better grades, but offers excellent value.
HNear-colorless. Color slightly noticeable. Good value for the quality.
INear-colorless. Slight color visible.
JNear-colorless. Noticeable color.
K-ZNoticeable color to the naked eye, with the intensity increasing progressively from K to Z.


Carat Weights

Here's a table that outlines diamond carat weights up to 10 carats, along with diameter sizes to help you visualize their approximate sizes:

Carat WeightApproximate Diameter (mm)
0.25 ct4.1 mm
0.50 ct5.0 mm
0.75 ct5.7 mm
1.00 ct6.4 mm
1.50 ct7.4 mm
2.00 ct8.1 mm
3.00 ct9.3 mm
4.00 ct10.2 mm
5.00 ct11.0 mm
6.00 ct11.7 mm
7.00 ct12.4 mm
8.00 ct13.0 mm
9.00 ct13.5 mm
10.00 ct14.0 mm


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