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Most diamonds have a low nitrogen content, which gives them a hue of yellow, or hydrogen, that rather gives a gray hue. The best way to discern the color of a diamond is by comparing it to another diamond. To do so, the ideal conditions are a room lit by natural light, but you can also use a lamp that produces a neutral light.

Color and numbers

The perfectly transparent stones are rare. A stone of color D / purity IF is considered having perfect color and purity.

  • Color F - value reduced by about 40%

  • Color H - value reduced by about 60%

  • Color K - value reduced by about 75%

IF stones are particularly rare, the discount will not be as strong for stones with some inclusions.

A colored stone D / purity Vs2

  • Color F - value reduced by about 20%

  • Color H - value reduced by about 35%

  • Color K - value reduced by about 50%

A stone of color D / purity Si2

  • Color F - value reduced by about 7%

  • Color H - value reduced by about 20%

  • Color K - value reduced by about 40%

A colored stone D / purity i1

  • Color F - value reduced by about 6%

  • Color H - value reduced by about 10%

  • Color K - value reduced by about 35%

 

Source Rapport List