25 August, 2018

Fancy-Coloured Diamond Guide

You're becoming diamond connoisseurs with numerous guides explaining what they are. 

Fancy-coloured diamonds boast amazing stories regarding their formation. They become saturated with elements which give them their intense colour. However, they are so rare because 1 in 10,000 diamonds found are fancy-coloured! You can read this in our article: What Are Fancy-Coloured Diamonds?

These rare processes have made their prices reach incredible heights and we're going to tell you the story of your favourites in this three-part series explaining the 12 fancy-coloured diamonds.

Red Diamonds

At the top of rarity scale are diamonds with red or reddish colours which command massive prices.

The source of their colour is unknown. However, an example of an argument is a change in their internal structure when light passes through the diamond. It bends in a way, a red colour shows.

Trivia - Red diamonds look their best in the daylight but worse in fluorescent light.

Blue Diamonds

Next on the rarity scale, are blue diamonds. If it isn't their colour, it's their rarity.

Blue diamonds get their colour from saturation with boron. However, pure blue diamonds are rare. Why? Usually, they contain hints of grey because of impurities in the boron - so the chances of seeing a pure blue diamond are rare.

Trivia - a blue diamond is subject to a wide colour scale from faint blue to fancy dark.

Another factor explaining their rarity is the balance involving demand and supply.

NOTE: Blue diamonds are different to sapphires which form part of a different family. Sapphires are from the corundum family and contain the likes of iron, copper, magnesium and others. 

Green Diamonds

What makes green diamonds interesting is their hue because it's on the surface of the diamond. This prompts gem cutters to leave as much green as they can round the girdle of the diamond. 

NOTE: To get an insight into the different aspects of a diamond, check our guide: Diamond Guide - Cut.

They get their colour from radiation separating the diamond's internal carbon atoms. It's common for a green diamond to have a secondary colour so finding a pure green diamond is difficult.

Trivia - the radiation comes from harmless radioactive rocks over millions of years or artificial irradiation treatment. 

Natural-coloured green diamonds endure extensive tests to check for artificial treatment.

Despite these tests, it's difficult to determine its colour origin. One way cutters help is by leaving an unpolished area within the girdle and the pavilion to expose the natural colour of the rough diamond.

Trivia - A green diamond's colour scale ranges from faint to fancy deep

Brown Diamonds

You had rare, meet common! Brown-coloured diamonds are the most common fancy-coloured diamonds. 

They are the result of a distorted internal structure. The structure contains holes which cling together and affect light when it passes through the diamond.

Ample amounts of brown diamonds have appeared throughout history and fashioned into jewellery which affected their price and popularity. 

Trivia - brown-coloured diamonds go by other names such as cognac and champagne but they are still brown-coloured diamonds!

Their colour scale ranges from 'very light' to 'very dark'.

Final Words

Fancy-coloured diamonds will continue to be the marvel of the diamond world thanks to their rarity and different forms. 

There are 12 fancy-coloured diamonds in total and will form a new series which explores their mysterious world.

Which diamond is your favourite? Hit the share button and let us know!

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Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.
Fancy Coloured Diamond Guide - Blue, Red, Brown and Green.