Coloured Diamond Gemstone Guide

Coloured diamonds are among some of the worlds most coveted gemstones. Their range in colours, along with their rarity and high demand, makes them an ever popular choice. Join us as we delve into what makes coloured diamonds so popular, from their characteristics to their history, this guide will deepen your appreciation for these stunning gems.


Coloured Diamond Gemstone Guide

Coloured diamonds are among some of the worlds most coveted gemstones. Their range in colours, along with their rarity and high demand, makes them an ever popular choice. Join us as we delve into what makes coloured diamonds so popular, from their characteristics to their history, this guide will deepen your appreciation for these stunning gems.


The 4 Cs: Cut, colour, clarity, and carat weight, collectively known as the 4 Cs, serve as the essential parameters for determining the quality and value of a diamond.

GIA CERTIFIED: A GIA certified diamond is a gem that has undergone evaluation by the Gemological Institute of America, ensuring its quality based on cut, colour, clarity, and carat weight.

Synthetic, laboratory grown, laboratory created, man-made, or cultured diamond: Lab grown diamond.

MOHS Scale: This tells us the Hardness (or strength) of a gemstone. Diamonds are the Hardest!

Heat Treating: The act of applying heat to a stone, bringing it to near-melting point to improve colour or clarity. 

Inclusions: An inclusion is a cavity or crystal cluster within a gemstone. These can cause problems if they form too close to the surface, and their presence will often decide the value of a stone.

What is a Coloured Diamond

A coloured diamond, also known as a fancy diamond or a fancy coloured diamond, is a unique type of diamond that comes in various colours like yellow, blue, pink, and even black. These colours occur when different elements squeeze their way into the diamond while its forming. These diamonds are one of the most popular gemstones in the world and are a great choice if you are looking for a diamond that holds a unique and individual beauty.

Shop Coloured Diamond Collection

If you're looking for a piece of coloured diamond jewellery, take a look at our stunning collection of engagement rings, loose gemstones and wedding rings.

Coloured Diamond Meaning

Each coloured diamond holds its own unique symbolism. For example, yellow diamonds (also known as canary diamonds) represent joy and optimism with their cheerful hues. While blue diamonds have a more calming meaning as they symbolise tranquility and wisdom. Pink and red diamonds embody romance and passion, as well as strength. Black diamonds are also known to represent mystery and power. 

With each colour of diamond having its own meaning and symbolism, fancy coloured diamonds are a gemstone with a rich and meaningful background.

Coloured Diamond Hardness

As with colourless diamonds, fancy coloured diamonds have a hardness level of 10, making them the hardest naturally occurring material in the world. This level of exceptional hardness makes coloured diamonds a perfect choice for everyday wear, meaning they are a great choice for an engagement ring. 

The hardness level of coloured diamonds doesn't vary depending on which colour it exhibits. For example, green diamonds are just as hard as their pink or yellow counterparts. 

Lab Grown Coloured Diamonds

Lab grown diamonds are taking the world by storm at the moment, with their lower price point and ready availability, they are a great choice for those who are looking for a fantastic quality diamond with a smaller price tag. Lab grown fancy coloured diamonds are also readily available on the market, and with the ability of lab grown gemstones to achieve a more specific colour and clarity, finding the perfect coloured diamond is certainly possible.

Coloured Diamond Value

Coloured diamonds are among most expensive gemstones in the world. This is due to their exceptional rarity and high demand. The quality for each individual diamond can be decided based on 4 factors, cut, clarity, carat weight and colour (the 4Cs). This means that coloured diamonds with a more vivid colour, bigger carat weight, better clarity and more skilful cut will be priced higher. 

Some fancy diamond colours are rarer than others, for example red diamonds are the hardest to come by so they will be more expensive than other, more common colours such as brown.

"fancy Coloured diamonds come in a beautiful rainbow of colours. They're a stunning choice if you're looking for a gemstone that's both refined and individual"


Coloured Diamond Rarity

Compared to colourless diamonds, fancy coloured diamonds are rare and considered more unique. Among coloured diamonds, some are rarer than others. For example, a pink diamond with a vibrant colour saturation are far rarer to find naturally than a pale salt and pepper diamond.

Finding a naturally occurring coloured diamond that has the desired colour, cut, clarity and carat weight is also challenging. Coloured diamonds with a higher carat weight, crystal clear clarity and a saturated, vivid colour are exceptionally rare. Which is one of the reasons why lab grown gemstones have gained so much popularity, the control that laboratories provide means that coloured diamonds can be produced to hold the desired quality for a lower price.

Coloured Diamond Inspiration

Fancy Coloured Diamond Colours

Coloured diamonds come in a wide range of colours, tones and hues. From vivid blues and pinks to radiant yellows and oranges, fancy coloured diamonds have a wide spectrum of colour, making them the perfect stone if you are looking for a gem that's both unique and luxurious.

Yellow Diamonds

Yellow diamonds, also known as canary diamonds, are loved for their warm, sunny tones. These stones are one of the most popular diamond colour choices because of their rarity and unique charm. If you are looking for a vibrant and joyful gemstone, yellow diamonds could be the perfect choice for you.

Pink Diamonds

Pink diamonds are exceptionally rare, with only a small percentage of diamonds mined exhibiting this coveted colour. Due to their scarcity and stunning appearance, pink diamonds hold a special allure and are highly prized by collectors and enthusiasts. 

They are often regarded as symbols of romance, femininity, and elegance, making them a sought-after choice for engagement rings and other fine jewellery pieces, where they add a touch of timeless sophistication and undeniable beauty.

Brown Diamonds

Brown diamonds are often referred to as champagne diamonds, cognac diamonds, or chocolate diamonds depending on their shade. They have gained popularity in recent years due to their warm, earthy tones and affordability compared to other coloured diamonds.

The intensity of the brown colour can vary, ranging from light champagne to deep cognac or chocolate tones. Despite their more subdued appearance, brown diamonds have a unique allure and are increasingly appreciated for their natural beauty and versatility, adding a touch of understated elegance to any piece of jewellery

Green Diamonds

Green diamonds range in tone from subtle pastel greens to deep, rich shades, with intensity and saturation greatly influencing their rarity and value. These diamonds are esteemed for their unique beauty and scarcity, making them highly sought after by collectors and connoisseurs alike. 

Green diamonds are often associated with qualities such as growth, renewal, and abundance, adding a touch of natural elegance and intrigue to any jewellery piece they adorn.

Where to Buy Coloured Diamonds in the UK

If you're on the hunt for coloured diamond jewellery then look no further! At Jessica Flinn, we love working with bright and colourful gemstones and would love to collaborate with you to create your dream coloured diamond ring.

Schedule an appointment with one of our expert team members today, whether you prefer an in-person visit to our showroom or opt for a virtual appointment – we are dedicated to assisting you every step of the way!

Coloured Diamond FAQs

Are coloured diamonds more expensive?

Natural coloured diamonds are generally more expensive than clear diamonds. This is because they are harder to find naturally, making them a more sought after option. Lab grown coloured diamonds can be a cheaper option if you're working with a budget in mind.

Are coloured diamonds real?

Coloured diamonds are absolutely real. The only difference between coloured diamonds and traditional colourless diamonds is the presence of chemical impurities or structural defects during their formation process in coloured diamonds. While colourless diamonds, also known as white diamonds, are transparent and lack any noticeable colour, appearing clear or icy white, coloured diamonds come in an array of colours from yellow, pink, brown and even black.

Where do coloured diamonds come from?

Natural coloured diamonds are found in countries all over the world, each region renowned for producing diamonds of specific hues. Australia, particularly the Argyle diamond mine in Western Australia, is famed for its production of pink and brown diamonds. South Africa yields diamonds in yellows, browns, and rare blue diamonds. Brazil is known for its yellow and brown diamonds, while Russia produces yellow, brown, and occasionally pink diamonds from mines like the Grib Diamond Field. 

In Canada, mines like Ekati and Diavik are recognised for their high-quality fancy coloured diamonds, including yellow and pink. Additionally, countries like India, Angola, and others contribute to the global supply of coloured diamonds, making the world's diamond market a diverse tapestry of colours and origins.

Which colour diamond is the most expensive?

The most expensive coloured diamonds are often those with intensely vivid and rare hues, such as red, blue, and pink. Of these, red diamonds are typically the most expensive per carat, followed by blue and then pink. 

The value of a coloured diamond is influenced by factors such as the intensity and purity of the colour, the size and clarity of the stone, and market demand. Extremely rare and large stones with vivid and highly saturated colours can command premium prices, sometimes reaching millions of dollars per carat at auction.

What colour diamonds are the rarest?

The rarest colour for diamonds is often considered to be red. Red diamonds are exceptionally rare, with only a handful known to exist worldwide!