While diamonds are graded using the system devised by the Gemmological Institute of America (GIA) in the 1950s, there is no standardized or universally accepted grading system for colored stones like rubies, sapphires, emeralds, etc. Historically, it has always been a general practice to grade colored stones with the unaided eye. However, we have devised a grading scale, on the basis of the diamond grading scale, which is easy to understand and not only takes into consideration appearance with the naked eye but also the appearance under 10x magnification (i.e. a jeweler's loupe).

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Detailed Clarity Grading Scale on the Basis of which the Colored Stones listed in our store are graded (the first one being the best and the last one being the lowest grade)

Note: The numbers denote the intensity of inclusions i.e. the intensity of inclusions in a stone with VVS2 clarity would be more than those in a stone with VVS1 clarity.

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Gemstones are also graded on a scale from “A” to “E” by our gemmologists based on the overall appearance and after taking into consideration the combination of the following criteria:

1. 1.General Rarity
2. 2.Clarity Grade, intensity of inclusions and effect of inclusions on the overall appearance of the stone
3. 3.Hue, Tone and Saturation of Colour
4. 4.Cutting Grade
5. 5.Origin
6. 6.Appearance of the gemstone in relevance to the general appearance of stones in that particular group

This is a general grading scale which divides all gemstones into 5 parts depending on a variety of factors. A Majority of the stones listed on the store are grade “A” and grade “B” stones since we list very few grade “C’, “D” and “E” stones.

Also See: Gem Certification