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  1. Home
  2. Jewellery Education
  3. Four C's

Canadian Diamond Guide

Four C's

Gemstone Guide

Metal Guide

Diamond Carat
Diamond Clarity
Diamond Colour
Diamond Cut

Diamond Colour

Diamonds range in colour from colourless to light yellow to light brown. Colourless diamonds are the rarest and the most valuable.

The Gemological Institute of America (GIA) has created a 12-letter alphabetical scale that is the industry standard for grading the colour of diamonds. Each letter represents a range of colour based on a diamonds tone and saturation.  Every diamond is graded under controlled conditions – this is the comparison of a stone to a round brilliant diamond of known colour. These stones are called master stones.

This 12-letter alphabetical scale ranges from D- colourless to Z- light coloration. It is possible for a diamond to emit a colour more intense than a Z rating, these diamonds are called “Fancy Colour” diamonds. The value of an intensely coloured stone can jump dramatically, even surpassing the value of a flawless diamond.

Fancy colours can include, canary yellow, blue, pink, champagne, green, red and even orange. 

What does colour refer to?

The colour of the diamond refers to how colourless the diamond is – perfectly white, colourless diamonds are extremely rare.

How is the colour determined?

a diamonds colour is determined by the Gemological Institute of America’s colour sale. This scale ranges from D (colourless) to Z (yellow).

Colourless

Clear Color

Near Colourless

Near Colourless

Slightly Tinted

Slightly Tinted

Slightly Yellow or Brown

Slightly Yellow or Brown

Light Yellow or Brown

Light Yellow or Brown

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