Value of the diamond depends on four main characteristics: Carat, Color, Clarity and Cut, also called «4С».
Weight of the diamond is measured in carats, a metric "carat" is defined as 200 milligrams.
The diamond color evaluation is based on the absence of color.
Diamond clarity is a quality of diamonds relating to the existence and visual appearance of internal characteristics of a diamond called inclusions.
|F||Flawless||No inclusions and no blemishes visible under 10x magnification|
|IF||INTERNALLY FLAWLESS||No inclusions visible under 10x magnification|
|VVS1 VVS2||VERY, VERY SMALL INCLUSIONS||Inclusions so slight they are difficult for a skilled grader to see under 10x magnification|
|VS1 VS2||VERY SMALL INCLUSIONS||Inclusions are observed with effort under 10x magnification, but can be characterized as minor|
|SI1 SI2||SMALL INCLUSIONS||Inclusions are noticeable under 10x magnification|
|I1 I2 I3||IMPERFECT||Inclusions are obvious under 10x magnification which may affect transparency and brilliance|
A diamond's cut is crucial to the stone's final beauty and value. Cut can be rated as Excellent, Very good, Good, Fair or Poor.