This chart represents the plotting of clarity characteristics as they may appear on a Grading Report from an Independent Lab, such as the Gemological Institute of America, the Jewelry Industry's foremost leader in Education and Evaluation of diamonds and colored stones. Generally, internal characteristics are plotted in red and external (surface) characteristics in green. The plotting is generally "exaggerated" in size to reflect the "nature" of the characteristics, and not the relative size. Even inclusions which are difficult to see under 10x magnification may appear quite large on the plot, in order to accurately describe the type of characteristic to anyone viewing the stone and the report. Please be warned, the enlarged chart is very large and may take a while to open with a slow modem.IF - INTERNALLY FLAWLESS - describes diamonds which have no internal characteristics observable under 10x magnification, the same conditions as (FL), but which have minor surface blemishes that do not penetrate the stone. These stones are potentially flawless if they underwent additional finishing.
VVS1 & VVS2 - VERY, VERY SLIGHTLY INCLUDED - describes diamonds that have very, very small inclusions which are difficult for a gemologist to see at 10x magnification.
VS1 & VS2 - VERY SLIGHTLY INCLUDED - describes diamonds with very small inclusions which can be difficult to observe with 10x magnification. Inclusions are not visible to the unaided eye, except on larger stones or occasionally with Emerald Cut diamonds.
SI1 & SI2 - SLIGHTLY INCLUDED - describes diamonds with small inclusions which are usually obvious when viewed with 10x magnification. Inclusions are difficult to see with the unaided eye, except on larger stones or occasionally with Emerald Cut diamonds. Generally SI1 graded stones are eye clean, while SI2 graded stones may or may not be eye clean.
I1, I2, & I3 - IMPERFECT - describes diamonds with medium to large inclusions (Piques) which are usually obvious to a gemologist with the unaided eye. An I1 may have an inclusion located to the side while an I2 will have it centrally located or numerous inclusions.
VVS1 & VVS2 - VERY, VERY SLIGHTLY INCLUDED - describes diamonds that have very, very small inclusions which are difficult for a gemologist to see at 10x magnification.
VS1 & VS2 - VERY SLIGHTLY INCLUDED - describes diamonds with very small inclusions which can be difficult to observe with 10x magnification. Inclusions are not visible to the unaided eye, except on larger stones or occasionally with Emerald Cut diamonds.
SI1 & SI2 - SLIGHTLY INCLUDED - describes diamonds with small inclusions which are usually obvious when viewed with 10x magnification. Inclusions are difficult to see with the unaided eye, except on larger stones or occasionally with Emerald Cut diamonds. Generally SI1 graded stones are eye clean, while SI2 graded stones may or may not be eye clean.
I1, I2, & I3 - IMPERFECT - describes diamonds with medium to large inclusions (Piques) which are usually obvious to a gemologist with the unaided eye. An I1 may have an inclusion located to the side while an I2 will have it centrally located or numerous inclusions.
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