Table of Mohs' Hardneses / Table of chemical Elements / Table of Streaks /
Table of Comercial name / Table of Dispersion / Gemstones in order of Crystal Systems / Table of specific Gravities
|GIA Diamond grading color & clarity|
|GIA Color Scale||D||E||F||G||H||I||J||K||L||M||N||O||P||Q||R||S||T||U||V||W||X||Y||Z||Z+|
|GIA Color Scale||Colorless||Near Colorless||Faint Yellow||Very Light Yellow||Light Yellow||Favcy|
|Trade Terms||Finest White||FineWhite||White||Commercial
|Wesselton||Top Crystal||Crystal||Top Cape||Cape||Low
|Very Light Yellow|
|Trade Terms||Colorless||Stones in these grades look colorless
face-Up; slight traces of color will not
be apparent in mounted stones to other
than the trained eye.
|Small stones in this range
will look colotless face-up
when mounted, but large
ones will be tinted
|Mounted stones in these grades will display a yellowish tint even
to the untrained eye.
|Grading for Clarity|
Definition of clarity grading Most of the following descriptions are most applicable to round brilliants in typical jewelry
sizes; characteristics may be more visible in large stones and fancy shapes. When you assign a clarity grade, consider
the size, number, position, nature,and color or relief of the various clarity characteristics. Summarize the factors; do not
try to analyze them separately.
FLAWLESS diamonds.FI FLawless diamonds show no blemishes or inclusions when examined by a skilled and experiencedgrader
under 10x magnification.
The following do not disqualify a stone from the flawless category
1) An extra facet on the pavilion which cannot be seen face-up.
2) Naturals totally confined to the girdle, which neither thichen the girdle nor distort its outline.
3) Internal graining which is not reflective, white, or colored, and does not significantly affect transparency.
|VVS-grade diamonds. IF IF stones show no inclusions and only insignificant blemishes under 10x. Normally what separatesIF from FL
Stones are characteristics that can be removed by minor repolishing (light surface graining is an exception).
|VVS-grade diamonds. Diamonds contain minute inclusions that are difficult for even a skilled grader to locate under 10x
|VVS1||Diamonds contain minute inclusions that are difficult for even a skilled grader to locate under 10x
magnification they are extremely difficult to see, visible only from the pavilion, or small and
shallow enough to be removed by minor repolishing.
|VVS2||Diamonds contain minute inclusions that are difficult for even a skilled grader to locate under 10x
magnificationthey are extremely difficult to see, visible only from the pavilion, or small and
shallow enough to be removed by minor repolishing, they are very difficult to see.
|VS-grade diamonds. Stones contain minor inclusions ranging from difficult.|
|VS1||Contain minor inclusions ranging from difficult to somewhat easy.|
|VS2||Contain minor inclusions ranging from difficult to somewhat easy for a trained grader to see under
10x magnification. Small included crystals, small feathers, and distinct clouds are typical.
|SI-grade diamonds. Stones contain noticesble inclusions which are easy.|
|SI1||Stones contain noticesble inclusions which are easy or very easy to see under 10x magnification.|
|SI2||Stones contain noticesble inclusions which are easy or very easy to see under 10x magnification. In
some SIs inclusions can be seen with the unaided eye.
|I-grade diamonds contain inclusions which are obvious to trained grader under 10x magnification, can often be easily
seen face-up with the unaided eye, seriously affect the stone's potential durability, or are so numerous they affect
transparency and brilliance.
|Imperfect||I1||Beauty and durability some defeted.|
|I2||Beauty or durability severely defected.|
|I3||Beauty and durability are severely defected.|