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Diamond gemstones are graded according to each diamond's cut, colour, clarity and carat weight.
Every diamond is valued by its cut, colour, clarity and carat weight. Of equal carat weight and clarity, a coloured diamond graded as a Fancy Colour will probably cost you more than the diamond simply graded as a jewelery grade D-F colour.
Diamonds are graded according to clarity, colour, cut and carat weight, basically in that order of priority.
Diamonds are graded according to their cut, clarity, carat weight and colour. You can read more about each, below.
Diamonds are graded on charts used for colour and clarity: while other characteristics are simply givens, including cut and carat weight.
The most important things are colour, cut, and clarity. Ask for specifics on each. Diamonds are graded according to quality.
Black diamonds, like all diamonds are graded on carat weight, cut, colour and clarity. You can read more about black diamond -- Carbonado -- below.
Trained gemologists use a 10x magnification to identify diamond clarity. You can read more about how clarity is graded by understanding the flaws and how they occur, below.
Diamonds are graded according to cut, colour, clarity and carat weight. When cutting a rough diamond stone, the diamond cutter first determines the natural colour of the stone, then plans a cut that preserves the highest carat weight for its maximum clarity. So the highest grade of diamond is the largest stone with zero flaws in the rarest colour with the most perfect cut for that stone. These diamonds are sold at auction and bring millions of dollars to sellers. In jewelry, the D colour is the highest grade colour; internally flawless is the highest clarity, blue and red could be the rarest natural colours. The Gemological Institute of America's Web site will help you better understand the four Cs, below. Finally, exceptional stones, are also graded according to the type of diamond, the most common being Type I. Read more about diamond types, below.
Every diamond is valued/ priced/ worth whatever someone will pay you for it. Individually, a diamond can be graded by is cut, colour, clarity and carat weight, all of which combine to establish a fair market value for the stone.
Depending on the kind of certification you want, you can either:buy Kimberley Process certified stones, which are certified as not blood diamonds, orbuy a graded stone that has a certificate produced by a certified gemologist, which gives the colour, cut, clarity and carat weight of the stone.
SI2 indicates that in at least two places inside the diamond, inclusions, however slight, are visible.You can view diamond clarity images, below, including one for a diamond graded as SI2.