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Diamond Colour

Pure white is generally defined as the absence of colour and this is what most people look for in a diamond. The clearer the stone, the more light passes through it allowing it to sparkle more.

Diamond colour is all about what you can’t see. Diamonds are valued using a simple concept – the less colour, the higher their value. The exception to this is fancy-colour diamonds, such as pinks and blues, which lie outside this colour range.

HRD, GIA and IGI use an internationally accepted system for grading diamonds according to the purity of their colour.

The scale begins with the letter D, representing colourless, and continues with increasing presence of colour to the letter Z, or near-colourless. Each letter grade has a clearly defined range of colour appearance. Diamonds are colour-graded by comparing them to stones of known colour under controlled lighting and precise viewing conditions.

The scale starts with D being the highest standard for a colourless stone and travels downwards through the alphabet to take into account stones with faint or light traces of yellow.

  • Diamonds that are graded D to F are extremely rare.
  • Diamonds graded G to I show almost no colour to an untrained eye.
  • Diamonds graded J to L contain faint traces of yellow and so on.

DEF: Colourless
GHI: Near Colourless
JKL: Faint Yellow
MNO: Very Light Yellow
PQR: Light Yellow

Many of these colour distinctions are so subtle as to be invisible to the untrained eye. But these slight differences make a very big difference in diamond quality and price.