All About Diamonds (Part 2 of 4) – By Shivraj Gaekwad

The 2nd C – COLOUR

  • Colour grading is a very important factor when it comes to grading diamonds and the color grade can very highly affect the price.
  • It is commonly believed that most diamonds are white, although strictly we should say colourless.
  • This is incorrect, most diamonds actually show at least a trace of body colour, and many are quite deeply coloured.
  • Colour grading of diamonds depends a lot on the lighting conditions and the skill and the perception of colour of the grader.


  • It’s really a matter of personal preference.
  • Most Diamond companies have promoted white as being the most expensive colour for diamonds.
  • Most people believe that white is best, and some even believe that coloured diamonds are bad.
  • Whereas fancy coloured diamonds generally command a higher value.
  • It is generally true that colourless diamonds are more expensive than tinted diamonds, it is not true that they are better just different and that is the only major difference.


Lets see the grades!

diamond colorsComments on the chart

  • Most people would find it difficult to differentiate between diamonds in the first four colour grades, D, E, F and G, even when unmounted.
  • Mounted diamonds of these grades, and also H and I appear colourless.
  • Small mounted diamonds down to J and K colour will usually also appear colourless except under careful inspection.

The Colour Grading Pyramid

grading pyramid

How Do Diamonds Get Colour ?

  • To understand this question its important to understand how diamonds are formed.
  • Diamonds, crystallize and form under intense heat and pressure about 150 kilometers below surface, just above the Earth’s molten core.


  • The physical conditions necessary to color a diamond naturally occur very scarcely, making natural color diamonds extremely rare.
  • The formation of natural color diamonds is a process that requires the presence of the original magical formula for all diamond creation and…
  • Also the presence of additional trace elements and distortions to the typical diamond crystal.
  • If an element interacts or gets included with carbon atoms during diamond creation, the diamond’s color can change.
  • Radiation and pressure on a diamond’s structure will also impact its color as well.
  • The included elements or the radiation can change the way the diamond absorbs and reflects light and thus gives it a fancy or light colour depending on the magnitude.
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