Natural Colour Pink Diamonds

An introduction to what pink diamonds are, and why pink diamonds are great investments or purchases

The pink diamond is one of the most beautiful and sought after diamond in the world, for both beauty and rarity reasons. It is therefore unsurprising that it is also one of the most expensive and difficult to acquire diamonds in the world.  

If you are planning to invest in a pink diamond for your loved one but are not sure where to begin, then Argyle Diamond Investments can offer a range of suitable options. There are a number of aspects to pink diamonds to be considered before any purchase. In this broad guide, we will discuss the origin, nature and value of the pink diamond’s colour. 

Diamond Colours

Not many people are aware that diamonds exist in a variety of colours beyond the traditional white.  In fact, it is possible to obtain diamonds ranging in colour from blue and green, to brown, pink and yellow. Whatever the colour – the more intense it is, the more expensive the diamond will be. Whilst gemmologists are not usually able to determine exactly how individual diamonds obtain their colours, various studies have been conducted which indicate that the huge pressure undergone during the creation process is at least partially responsible. Some of the scientific mystery on how coloured diamonds are formed is part of their appeal.

Argyle pink diamonds copyrighted

Pink Diamonds

Pink diamonds, along with any hued varieties, are also known as “Fancy diamonds”. The larger the size and the more intense the pink colour, the more valuable the diamond will be. One of the largest vivid pink diamonds in the world is the “Pink Star”, a diamond of flawless clarity weighing in at around 60 carats. “Daria-i-Noor” and “Noor-ul-Ain” are two even older and larger pink diamonds, weighing in at 182 carats each. The highest grade pink diamond in the world to date is reportedly the “Pink Panther”, which sold in 2013 for a record breaking $82 million.

Pink diamonds can be brownish-pink, purplish-pink, and orangish-pink. Sometimes a pink diamond can exhibit both brown and orange hues at the same time. However, the most sought after pink diamonds are those that are pure pink, closely followed by those with a purple hue.

What gives the diamond its pink color?

The precise source of the colouration in these diamonds remains unclear, and various theories exist within the gemmological world which seek to explain this. It is generally accepted that blue diamond obtains its colour from the boron that it contains, green diamond obtains its colour from scattered carbon atoms, and that pink diamond obtains its hue due to a deformation of the diamond which causes the emission of pink light.

The most commonly accepted theory is that some diamonds go through more pressure than others during their formation process, and that pink diamonds represent those that have undergone the highest levels of pressure. It is also believed that seismic shocks may lead to altered molecular structures within the diamond, further contributing to the pink effect.

It can take millions of years for a pink diamond to form. It will remain trapped in a state of intense heat and severe compression during the formation process, which allows only pink light to penetrate and emit from the resulting diamond.

Intensity and Clarity

Pink diamonds vary widely in their intensity, with categories that include faint pink, very light pink, light pink, fancy light pink, fancy pink, fancy intense pink, fancy vivid pink, and fancy deep pink. Each of these intensities has a grade or master catalogue and a subscale of 1 to 10 (as per the GIA grading system). Within this range, fancy vivid pink diamonds are the most expensive, valued at least 20 times more than a high-quality white diamond. Argyle Mine, the world’s biggest source of pink diamonds, identifies intensity on a scale of 1 to 9 (9P, 8P, 7P, 6P, 5P, 4P, 3P, 2P, 1P), whereby 9P is the lightest and 1P is the brightest.

As pink diamonds undergo extremely high pressure for extended periods of time, they usually have an irregular shape. High quality specimens should have no impurities and be free of any yellow tint. The clarity of a pink diamond is determined by a process of 10x magnification. It is said that only 7% of the pink diamonds are “flawless” or “internally flawless”. However, even with low clarity, the pink diamond still sits above all other categories and remains of high value.

Why are pink diamonds so rare and expensive?

Pink diamonds are so expensive due to their extremely limited supply. They have been sourced at a small number of locations globally, including Brazil, Russia, South Africa, and Canada. Argyle Mine in Australia remains the major producer of pink diamonds accounting for a whopping 90% of the global supply. However, even in this mine, Pink diamonds are so rare that out of the 800 million carats of diamonds produced, pink diamonds make up less than 1% of the total.

The scarcity of pink diamonds inevitably makes them even more sought after. If you are able to afford it, they are a stunning beauty which can take your gem and jewellery collection to another level. Their rarity and limited availability also makes them an extremely smart investment option, and Argyle Diamond Investments specialises in helping our investor clients navigate the procurement, sale and safe storage of a pink investment diamond.