Diamond Colour

Key Points

  • Colour refers to a diamond's lack of colour, grading the whiteness of a diamond.
  • A colour grade of D is the highest possible, while Z is the lowest.
  • Blue Nile only sells diamonds with a colour grade of J or higher.

Colour manifests itself in a diamond as a pale yellow. This is why a diamond's colour grade is based on its lack of colour. The less colour a diamond has, the higher its colour grade. After cut, colour is generally considered the second most important characteristic when selecting a diamond. This is because the human eye tends to detect a diamond's sparkle (light performance) first, and colour second.

At Blue Nile, you'll find only the finest diamonds with colour graded D-J. Diamonds graded J or better are colourless or near-colourless, with colour that is typically undetectable to the unaided eye.

Not Carried At Blue Nile
Blue Nile Diamonds
Z-N
M-K
J
I
H
G
F
E
D
Noticeable colour
Near-colourless
colourless

Diamond Colour

Z-N
Noticeable colour. Not carried by Blue Nile.
M-K
Noticeable colour. Not carried by Blue Nile.
J-I
Near-colourless. An exceptional value with slightly detectable warmth or tone.
H-G
Near-colourless. Colour difficult to detect unless compared side-by-side against diamonds of better grades. An excellent value.
F-E
Colourless. Minute traces of colour can be detected by an expert gemmologist. A rare diamond.
D
Absolutely colourless. The highest colour grade. Extremely rare.

What Colour is Right for Me?

  • For the purist, look for a colourless diamond with a grade of D-F for a diamond with no discernible colour.
  • For an excellent value in a diamond with little or no noticeable colour to the unaided eye, look for a near-colourless grade of G-I

Now that you understand how colour affects the white look of a diamond, you are ready to learn about clarity.

Want to learn even more about colour? Check out our tips and hints section.

Have A Question

Contact us by phone at 00353 1 899 1351 from Netherlands, 0800 206 1160 from the United Kingdom, or 00353 1 899 1351 for all other EU countries or email at serviceuk@bluenile.co.uk. In addition, Live Chat is available during most business hours.

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