White diamonds are graded from D (colourless) to Z (light yellow), a classification scale created by the Gemological Institute of America. With standardised grading, diamond buyers can make more informed purchases.

At Taylor & Hart, we only use GIA-graded centre diamonds in our designs. Each diamond comes with an accompanying certificate stating its colour, clarity, carat and cut grade.

Grades D – F are colourless and icy white. These are considered the highest colour grades.

Grade G – I are nearly colourless, with distinctions so subtle most are indistinguishable to the untrained eye.

We recommend an I grade and above.


diamond colour

Another aspect of diamond color is fluorescence, a blue glow that appears when you expose a diamond to UV light. According to the GIA, fewer than 0.2% of diamonds with extremely strong fluorescence may appear hazy or oily in natural daylight. We only retail diamonds with fluorescence grades of none, faint and medium fluorescence because we believe your diamond should look beautiful in all lights.

When choosing a diamond, consider fluorescence last.

Our consultants are available to help you to better understand the importance of colour in a diamond and how this affects the design of your diamond engagement ring.

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