Blue diamonds are extremely rare and therefore very valuable. Blue is one of the rarest colours in the diamond industry, along with purple, pink and red. Because blue diamonds are so unique, a lot of questions rise about their rarity, authenticity, origin, colour and value, when considering them as an investment.
What is a blue diamond?
A blue diamond is a diamond which is authentic and not processed with chemicals or heat in order to obtain the blue colour. It is important – trough a certificate - to verify that the blue colour of the diamond is natural of origin. If the diamond is a real blue diamond, this will be mentioned on the certificate with the words "natural". Blue diamonds are a natural phenomenon of which no two are completely similar. They come in a wide range of shades such as bright or intense blue, gray-blue, purple-blue and greenish-blue. Blue diamonds are worldwide sought-after by collectors. Because they are so rare, they are often sold quickly to staggering amounts.
Are blue diamonds, real diamonds?
Yes, blue diamonds are “real” diamonds, as long as the blue colour of the diamond is natural. Other "blue" diamonds are - although these are real diamonds - artificially treated to obtain their blue colour. These are real diamonds, but no real “natural” blue diamonds. There is a big price difference between natural and artificial blue coloured diamonds. An artificial blue diamond will never have the same blue tone and intensity like a real blue diamond.
How rare are blue diamonds?
Coloured diamonds are in general more uncommon than colourless diamonds. Blue diamonds are Type IIb diamonds, who are extremely rare and most valued. In any case, the blue diamonds with an intense, deep blue colour are the most unique. The size of the stone determines the degree of rarity.
How are blue diamonds formed?
Blue diamonds are formed by nature, like all other "fancy coloured diamonds". Although the cutting and polishing can have an effect on the colour of a diamond, when blue diamonds are mined, the blue colour is already present in the diamond. The presence of boron and nitrogen particles combined, makes sure this substance will reflect and be intense blue. The formation of the diamond itself takes millions to billions of years. Under immense pressure and heat, carbon elements transform into rough diamond. During this process, other elements, such as boron, mingle with carbon so the blue colour occurs. Blue diamonds are mined worldwide in only a limited number of mines, including the Cullinan- mine in Pretoria, South Africa and the Argyle- mine in Australia.
How much is a blue diamond worth as investment?
The cost of a small blue diamond can easily rise up to several thousand of euros. The larger ones, such as the Wittelsbach - Graff diamond, can rise to millions of euros. As with colourless diamonds, the value of blue diamond is determined by the shade of colour, the colour intensity, the size and the purity of the diamond. BAUNAT DIAMONDS supports and advises potential investors when choosing the right diamond for investment.