Diamond Colour

Key Points

  • Of the 4Cs, colour is the second most important characteristic because the human eye detects sparkle first (diamond cut) and colour second.
  • As a diamond's colour grade improves, it's price increases. However, at a certain point, the colour difference cannot be detected unless under professional magnification.
  • To maximise your budget, choose what's called a near-colourless diamond (grades G-H) because the naked eye will still not see traces of colour for these grades.

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. Blue Nile offers only Colourless (grades D-F) to Near-Colourless (grades G-H) diamonds to assure that any natural colour present is typically undetectable to the unaided eye.

Grading Scale

Use the slider to see colour grade details or view the Colour Grade Chart below.
K-Z
J
I
H
G
F
E
D
D - Absolutely Colourless
The highest colour grade. Extremely rare.
See D Graded Diamonds

Diamond Colour Grade Chart

D
D Graded Diamond

Absolutely Colourless

The highest colour grade. Extremely rare.

See D Graded Diamonds
E-F
F-E Graded Diamond

Colourless

Minute traces of colour can be detected by an expert gemmologist. A rare diamond.

See E & F Graded Diamonds
G-H
H-G Graded Diamond

Near Colourless

Colour difficult to detect unless compared side-by-side against diamonds of better grades. An excellent value.

See G & H Graded Diamonds
I-J
J-I Graded Diamond

Near Colourless

An exceptional value with slightly detectable warmth or tone.

See I & J Graded Diamonds
K-Z
M-Z Graded Diamond

Noticeable colour

Not carried by Blue Nile.

Expert Buying Tips

  • For the purist, look for a Colourless grade of D-F for a diamond with no discernible colour under magnification.
  • For the best value, choose a Near-Colourless grade of G-J for a diamond with no discernible colour by the naked eye.
  • Consider platinum or white gold settings when buying higher colour grade diamond; a gold setting may show through a colourless diamond.

Next, learn about Diamond Clarity.

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

Have A Question?

Contact us by phone at 00353 1 899 1351 from Romania, 0800 098 8541 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.