Diamond colours

The hue and intensity of a diamond’s colour is directly related to its value. A perfect diamond is completely colourless without a hint of colour.

The rarest diamonds are white – in fact colourless, to be precise. But they represent less than one percent of all diamonds in the world. The remainder are coloured to varying degrees.

Learn more about Colour

Top Wesselton and other diamond colours

Diamond colours are classified according to nine main categories. The highest class (River D) refers to the completely colourless diamonds, while the lowest quality covers diamonds with an intense yellow tone.

At Hartmann’s, we work exclusively with high-quality diamond colours: River (D-E) Top Wesselton (F-G) and Wesselton (H).

GIA’s colour grading scale

The scale was developed by the GIA (Gemological Institute of America) and is used internationally.

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Diamond colours with tone

A common assumption is that diamonds are made of pure crystallised carbon. This is not entirely true. In fact, 98% of all diamonds contain an additional element, namely nitrogen, which is associated with carbon and which gives the stone a yellowish tint.

This does not affect the diamond’s ability to reflect light, and the difference can be almost invisible. But it affects the price.

Diamond colours Fancy Colours

Fancy coloured diamonds are rare and highly sought after. The captivating colours are not only breathtakingly beautiful and intense, they also represent part of what makes fancy coloured diamonds highly valuable.

Fancy coloured diamonds are found in a multitude of different colours: yellow diamonds, green diamonds, brown diamonds, champagne diamonds, orange diamonds, grey diamonds, black diamonds, blue diamonds, pink and light pink diamonds.

The red, pink and blue diamonds are the most valuable.

Colour shades of Fancy Colour diamonds

The intensity of Fancy Colour Diamonds is graded in nine categories from ‘Faint’ to ‘Fancy Dark’ – with ‘Fancy Vivid’ as the most valuable.

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Pink diamonds and red diamonds

90% of the world’s pink and red diamonds are sourced from Rio Tinto’s Argyle Diamond Mine in Australia.

The Argyle Diamond Mine was established in 1985 and has produced about 15 million carats per year. Of the approximately 15 million carats the mine has produced every year, less than 0.02% was made up of pink diamonds.

The Argyle Diamond Mine closed on November 3rd, 2020, and the pink diamonds will be even more rare.

Only three jewellers in Europe have been selected to be ‘Argyle Pink Diamonds Select Ateliers’ – and Hartmann’s is one of them.

Read about Ulrik Hartmann’s visit to the Argyle Diamond Mine

The Argyle Pink colour spectrum

Pink diamonds are evaluated predominantly on their intensity of colour and not on clarity, as with white diamonds. The most beautiful and precious pink diamonds are those that project the most intense colour.

Many various hues of Argyle Pink diamonds are found in nature; from delicate blush to intense flushing pink.

View the Argyle Pink diamond jewellery collection
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The shop’s opening hours

View detailed opening hours
  • Monday 10:00 to 5:30
  • Tuesday 10:00 to 5:30
  • Wednesday 10:00 to 5:30
  • Thursday and Friday 10:00 to 5:30
  • Saturday 10:00 to 2:00

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