For over 60 years, De Beers has managed to convince jewellery lovers that diamonds mean love and should be treasured forever. In reality, it is coloured loose diamonds that are truly rare. Experts state that there is probably only one coloured diamond for every 100,000 D flawless stones, and it’s not necessarily flawless.
Colour equals price
Coloured diamonds are the most valuable in the world due to their exceptional rarity and beauty. If you’ve decided to invest in the coloured gems, be ready to pay unparalleled prices for red, green and blue diamonds. Purple, pink and violet diamonds are the following in rarity. Orange and olive diamonds belong to the next rarity – and price – level. These gems are followed by yellow, brown, grey, champagne, and black diamonds that are a bit more popular.
Colour saturation and clarity
When it comes to coloured diamonds, clarity is a secondary factor, while the colour intensity is the dominant one. Coloured diamonds are graded according to the saturation of colour and the hues presented in them. Depending on the colour saturation, the gems are graded Light, Fancy Light, Fancy, Fancy Dark, Fancy Intense and Fancy Vivid. The dominant colour is listed after the modifying colours.
Today, the Argyle mine is the world’s largest producer of unrivalled intense pink diamonds, providing about 95% of the entire pink diamond supply. The rarity of pink diamonds is “defined by Mother Nature” as only 40 carats of pink diamonds out of every 39.2 million carats of mined diamonds are estimated to be worthy of being presented for sale.
Once a year, pink diamonds are sold by special bids in the international VIP Pink Diamond Tender, organised by Argyle Diamonds.
Blue and green diamonds
Only limited quantities of blue and green diamonds are supplied by the Argyle Diamond Mine. Fancy blue diamonds come in a broad range of shades, from light blue to sapphire blue. The Blue Heart, weighing 30.82 carats, is one of the world’s rarest diamonds, deep blue in colour. Fancy green diamonds are usually not very deep in colour which gets even lighter during the fashioning of the gems.
The rarest diamonds in the world
Based on colour, the rarest diamond in the world is known as The Ocean Dream Diamond. It weighs only 5.51 carats but the diamond’s colour is unique – blue-green. The rarest diamond in the world based on size is the 3106.75-carat Cullinan Diamond which was cut in nine large chunks, 96 small ones and 9.5 carats of unpolished pieces and used in various British Crown jewels.
Among the rarest diamonds in the world one can also mention the reddish-brown 248.9-carat Earth Star, the white 559-carat Centenary Diamond, the fancy yellow 124.5-carat Golden Eye Diamond, the fancy deep blue 115-carat Hope Diamond, and others.