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Diamonds • Precious Gemstones • Jewelry • Gemology

Diamond Grades

Diamond Grades are reference points that help define a standard so dealers may communicate in a common language. Be wise, learn the language of diamonds

Natural flaws in diamonds are called inclusions and blemishes.

Interior inclusions might be tiny gas/air bubbles, solid deposits, clouds of tiny clear crystals, or cracks which are called feathers.

Ice cubes in water are good comparisons

External blemishes can range from chips, poor cuttings, scratches or pits on the diamond's surface.

Some diamond inclusions can be seen only by microscopic inspection or 10x loupe. Others are visible to the naked eye.

The more noticeable the inclusion, the poorer the grade.

Inclusions tend to do several things:
  • Interrupt paths of light
  • Detract the eye from the beauty of a diamond
  • Jeopardize the integrity of the diamond
We recommend buying in the VVS-VS range. You will not be paying a premium for Flawless or Internally flawless, but neither will not get stuck with a poor quality lifetime investment.

Comparing Color Grades
GIAAGSDescription
D0 Colorless
E.5
F1
G1.5 Near Colorless
H2
I2.5
J3
K3.5 Faint Yellow
L4
M4.5
N5 Very Light Yellow
O5.5
P6
Q6.5
R7
S7.5 Yellow
T8
U8.5
V9
W9.5
XYZ10

Notes:
-Rendering more subtle shades of color is difficult because of the 255 color limitation for browsers.

-The comparisons above are presented merely as indications.

Comparing Clarity Grades
GIAAGSDescription
Flawless0 No Flaws Internal or External
IF0 Internally Flawless - No internal flaws, perhaps minor facet junction abrasions
VVS11 Very, Very Slightly Included - Very, very small inclusions, difficult to see with a 10x loupe.
VVS22 Very, Very Slightly Included - Similar to Above / More Prominent Location
VS13 Very Slightly Included - Very small inclusions, hard to see in a 10x loupe. Perhaps greater in Number Than VVS
VS24 Very Slightly Included - Similar to Above / More Prominent Location, more inclusions
SI15 Slightly Included - Inclusions are obvious using a 10x loupe. Perhaps a cloud of inclusions.
SI26 Slightly Included - Similar to Above / More Prominent Location and in clouds
I17 Included - Inclusions are obvious to the naked eye. Prominent locations under table. Integrity of diamond may be compromised
I28 Included - Similar to Above / More Prominent Location. Not attractive, transparency compromised
I39 Included - Similar to Above / More Prominent Location. Not attractive, transparency compromised. As bad as it gets.
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