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The 4 C's of Diamonds - Colour

The 4 C's of Diamonds - Colour

Diamond colour measures lack of colour, graded D to Z. Explore E.C.One’s G-colour and above diamonds, plus fancy coloured diamonds and Champagne alternatives.

  • Bespoke London
  • diamond
  • EC One
  • engagement rings
  • ethical
  • the 4 C's
  • white diamonds
Updated on  January 27, 2026 by  Alison Skeates
The 4 C's of Diamonds - Colour
Diamond colour actually measures lack of colour. The closer a diamond is to being colourless, the rarer and more valuable it is.

Diamonds are graded on an international scale from D (colourless) to Z (tinted). At E.C.One, we use only G colour and above, ensuring our diamonds sparkle beautifully and retain their value.

Fancy coloured diamonds have a strong, even hue - such as yellow, pink, or blue. These are extremely rare and highly prized. Natural brown diamonds, often called Cognac or Champagne diamonds, are becoming increasingly popular as a stunning alternative to the classic white diamond.

A diamond’s colour comes from trace elements in its crystal structure:

> Blue diamonds often contain boron
> Fancy canary yellow diamonds gain their colour from nitrogen

Our carefully sourced diamonds are selected to balance beauty, rarity, and ethical standards.

Explore our diamond engagement rings, or book an appointment to view stones and discuss the details that matter most to you.

Want to learn more about choosing the perfect diamond? Read our Diamond blogs...


The 4 C's of Diamonds - Cut
The 4 C's of Diamonds - Carat
The 4 C's of Diamonds - Clarity 
An Insiders Guide To Diamonds
Diamond Engagement Rings - What's Your Perfect Style?


Published on  October 18, 2024Updated on  January 27, 2026 by  Alison Skeates
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