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Coloured diamonds – unique and precious stones

A diamond is the most classic and unique stone in the world. Its popularity comes not only from its beautiful appearance but also a variety of cuts and colours. If you are interested to know where coloured diamonds originate from and why they are so special, you will find the answer in this article!

1 in 10 000

Some colours come as rare as one in 10 000 diamonds mined.

History of coloured diamonds

Coloured diamonds are a real gem among gemstones. They combine two crucial features – being valuable and having amazingly attractive to the eye appearance.  This translates into their popularity, especially among celebrities and people from high society. In addition, this mineral, created entirely by mother nature, is extremely rare and jewellery adorned with it has a high market value.


The first records of these original minerals date back to the 6th century and are closely related to the caste system in India. Then, the colour of the crystal was matched to a social group – they were a symbol of social status and, for example, colourless or white diamond stones could only be owned by the members of certain castes. In Europe, however, awareness of coloured diamonds grew not long ago, in 1721, with the opening of the Green Vault, a museum of jewellery and goldsmithing, where visitors could admire unique jewellery and decorations with coloured gemstones.

Coloured diamonds - where are they mined and where do they come from?

Diamond deposits are scattered all over the world. In the case of these stones, their occurrence depends on the specific colour. Classic, colourless crystals are most often mined in the southern part of Africa, Brazil and India. However, other colours are less common and this greatly affects their price. One of the most famous mining sites for this mineral is the Australian Argyle mine, where champagne, pink, purple and even purple-coloured stones have been found.


There are almost 27 shades of diamonds and they vary in saturation and tone. The more intense the colour of the stone, the greater its value. What coloured diamonds can be found on the market?

●    Green diamonds – their colour is the result of radioactive radiation that has acted on the mineral for billions of years. The longer the stone is exposed to the radiation, the more intense its colour.

●    Blue diamonds – this colour is created by the presence of nitrogen and boron atoms in the stone structure.

●    Pink diamonds – their colour is not influenced by any external factor – they are formed as a result of a change in the internal structure of the crystal lattice itself.

●    Yellow diamonds – this colour is the result of high nitrogen concentration in the environment. The more of it, the more intense the colour of the stone will be.

●    Purple diamonds – their colour is the result of the presence of a large amount of hydrogen in the crystal structure.

●    Orange diamonds – these minerals are also formed due to the presence of nitrogen atoms, but their arrangement is different to the one in yellow or blue stones.

●    Champagne diamonds – in the case of this stone, nitrogen also affects the colour and its intensity.

●    Black diamonds – it is not a pure mineral but a mixture of diamond, amorphous carbon and graphite, which the crystal owes this colour. It is also known as Carbonado.

Why are coloured diamonds so unique?

Coloured diamonds account for only 0.1% of the total production of this crystal. Their colouring requires the occurrence of elements or other factors that have been affecting them for thousands of years. This makes their deposits much smaller and less frequent than of any other precious coloured stones.Contrary to other minerals, the value of coloured diamonds increases with the intensity of the colour, which is the most important evaluation criterion. The uniqueness of this mineral also comes from the fact that the extraction of certain coloured diamonds has already been terminated and new deposits are still undiscovered, which significantly increases the market value of existing diamonds.


The benefits of buying coloured diamonds

Purchasing coloured diamonds has several important advantages. It is a profitable long-term investment. Firstly, the investment of cash in precious stones is no subject to devaluation, because the value of a mineral is determined by its physical properties, which in this case do not change over time. Remember, however, that each parameter matters –clarity, colour, cut or size. The better these attributes are, the faster you can resell the crystal with more profit.

Coloured diamonds are also resistant to mechanical, thermal and chemical factors, so they are not damageable. Therefore, jewellery with these minerals can be passed down from generation to generation and becomes an important family heritage and a precious gift for children or grandchildren.


Is buying diamonds ethical?

Nevertheless, there exist a lot of controversy concerning diamonds. Unfortunately, it is a crystal infamous for improper sourcing practices. There are "blood diamonds" on the market, i.e. minerals mined illegally, the sale of which was intended to finance wars in Africa. Anyone not wanting to contribute to this practice must first of all carefully choose the supplier of this gemstone. For the purchase to be ethical, the mineral must come from a conflict-free country. That is why you should only buy coloured diamonds from places cooperating with authorized suppliers of this crystal.

The most famous diamonds in history

Diamond is the most famous gemstone in the world. No wonder that there are many interesting stories about this crystal and that it has become the subject of songs, films and advertising slogans. A Diamond Is Forever, created by De Beers company, became a cult slogan popularizing diamonds, which meant that this mineral is a symbol of durability and everlasting love.

A unique coloured diamond is Hope – a 45-carat blue gem. For many years it was considered as cursed, because the owners of this diamond usually ended their lives in tragic and mysterious circumstances. Although it had changed hands over the years, since 1958, it has been on display at the US National Museum of Natural History.

Another famous diamond is the Dresden Green Diamond of 41 carats size, making it the largest diamond this colour in the world. It is part of the Saxon crown jewels and has been for many years in the museum in Dresden, founded on the initiative of August III the Saxon.

One more unique specimen is the Florentine Diamond, which is 137.2 carats and has a slightly yellow colour. Despite the fact that over the years it was passed from hands to hands of eminent kings and rulers, its current fate is unknown, and the last mentions of it come from 1918.

As we can see, diamond is a stone with an extremely fascinating history. More and more people are choosing jewellery with this gem, because it is not only a good investment but also a beautiful and timeless accessory.

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