- The second most important of the 4Cs is colour because it’s what the eye notices next after sparkle.
- A diamond's colour actually refers to its lack of colour. The less colour, the higher the colour grade.
- To avoid a pale yellow colour, choose a diamond grade H or higher.
- Blue Nile offers only Colourless (grades D-F) to Near-Colourless (grades G-J) diamonds to assure that any natural colour present is typically undetectable to the naked eye.