Diamonds have always been synonymous with luxury, wealth, and timeless beauty. Within the world of these precious gemstones, there exists an elite group that stands above the rest in terms of value and rarity. These are the most expensive diamonds in the world, coveted by collectors, investors, and admirers alike.

In this exploration of the most expensive diamonds, we will embark on a journey through the dazzling realms of extraordinary wealth and beauty. From the mesmerising depths of blue to the enchanting shades of pink, these diamonds hold a place in history and captivate the imagination of those fortunate enough to encounter them.

Each of these diamonds represents a unique combination of exceptional size, flawless quality, and captivating colour, making them true marvels of nature.

Join us as we unlock the mysteries and explore the allure of these remarkable gemstones, which have become legendary for their rarity, cultural significance, and astronomical prices. Step into a world where the most expensive diamonds reign supreme, dazzling us with their unparalleled brilliance and leaving a lasting impression on the annals of luxury and prestige.

In this blog we will also explore coloured diamonds. Fancy coloured diamonds have long been celebrated for their captivating beauty and ability to evoke a sense of wonder. Among the kaleidoscope of colours that diamonds can exhibit, pink diamonds stand out as a rare and enchanting treasure. Their delicate blush hues have captured the imagination of gem enthusiasts, collectors, and jewellery connoisseurs alike.

Pink diamonds, often referred to as the "diamonds of romance," possess a distinct allure that sets them apart from their colourless counterparts. Their soft and feminine tones exude elegance and grace, making them a symbol of love, tenderness, and sophistication. But what makes pink diamonds so special, and why are they so highly coveted?

In this exploration of pink diamonds, we will delve into their unique characteristics, delve into their rarity and value, and discover why these gems hold a place of honour among the world's most sought-after gemstones. From their geological formation to their cultural significance, we will uncover the captivating story behind pink diamonds and the enduring fascination they inspire. Join us on this journey as we unravel the mystery and allure of these exquisite treasures of nature, the pink diamonds.

When you are searching for a precious stone, such as a coloured diamond, it is advised that you speak with a reputable jeweller who has the knowledge to guide you to make the right decision. Purchasing such a high value item is a huge investment, so speaking to the right team is paramount. The team at Morgan & Co have years of knowledge and access to a global network of diamond dealers who they trust immensely. You can contact the team at Morgan & Co to make a free, no obligation consultation to discuss, not only custom making a ring, but investing in a quality diamond. 

Table of Contents 

  • What are the most expensive diamonds in history
  • What are argyle Pink diamonds?
  • Why are argyle pink diamonds so expensive?
  • Are pink diamonds more expensive than blue diamonds?
  • Yellow Diamonds
  • Can you get fancy coloured diamonds in lab grown?
  • Famous people with coloured diamonds as engagement rings.
  • What colour gold do pink diamonds look best with?
  • Conclusion
  • FAQ's

What Are The Most Expensive Diamonds in History?

The world of rare and expensive diamonds is fascinating. Here are some of the most famous and valuable diamonds in history:

The Hope Diamond: Estimated to be worth around $250 million, the Hope Diamond is one of the most renowned gemstones. Its vivid blue colour and storied history contribute to its allure.

The Pink Star Diamond: This exceptionally rare and flawless pink diamond weighed 59.60 carats before being cut. It fetched a record-breaking $71.2 million at an auction in 2017.

The Cullinan Diamond: Discovered in South Africa in 1905, the Cullinan Diamond was the largest rough diamond ever found. It was eventually cut into multiple polished gems, some of which are part of the British Crown Jewels. The largest polished gem, known as the Cullinan I or the Great Star of Africa, weighs 530.4 carats.

The Koh-i-Noor Diamond: This diamond has a long and tumultuous history, passing through various hands and empires. It is currently a part of the British Crown Jewels and is estimated to be priceless due to its historical significance.

The Blue Moon Diamond: This rare blue diamond weighs 12.03 carats and was sold at an auction in 2015 for a staggering $48.4 million, making it one of the most expensive diamonds ever sold.

The Wittelsbach-Graff Diamond: Originating from India, this stunning blue diamond weighs 31.06 carats. It was sold at an auction in 2008 for around $24.3 million.

The Steinmetz Pink Diamond: Weighing 59.60 carats, this rare pink diamond is considered one of the most vivid and flawless diamonds of its kind. Its value is estimated to be around $50 million.

Please note that the values mentioned are approximations based on the information available up to September 2021, and the prices of diamonds can vary significantly over time due to market factors and changing demand.

What Are Argyle Pink Diamonds?

Argyle pink diamonds are a specific type of pink diamonds that originate from the Argyle diamond mine in Western Australia. These diamonds are renowned for their exquisite pink hues and exceptional quality, making them highly sought after and incredibly special. Overall, Argyle pink diamonds are regarded as some of the most exceptional and valuable gemstones in the world. Their rarity, stunning colours, and connection to the Argyle mine and Australian heritage make them truly extraordinary and highly coveted among gemstone enthusiasts and collectors.

Why are argyle pink diamonds so expensive?

Argyle pink diamonds are considered some of the most expensive diamonds in the world due to several factors:

  1. Rarity: Argyle pink diamonds are exceptionally rare. They are mined exclusively from the Argyle diamond mine in Western Australia, which is the primary source of pink diamonds globally. The mine has been in operation since the early 1980s but is set to close in 2021. The limited supply of these diamonds, combined with their unique colour, makes them highly sought after by collectors and investors.
  2. Colour Intensity: The colour of pink diamonds is graded based on their intensity, ranging from light pink to intense and vivid shades. The more saturated and vibrant the pink colour, the more valuable the diamond becomes. Argyle pink diamonds are known for their vibrant and intense hues, making them highly desirable.
  3. Colour Grading: The Gemological Institute of America (GIA) uses a specific grading system for coloured diamonds, including pink diamonds. The grading considers factors such as hue, tone, and saturation. Argyle pink diamonds that receive high colour grades and exhibit exceptional colour characteristics command premium prices in the market.
  4. Investment Potential: Argyle pink diamonds have gained a reputation as a lucrative investment opportunity. The limited supply, combined with the mine's closure, has created a sense of urgency among investors to acquire these diamonds before they become even rarer. This demand, coupled with their aesthetic appeal, has contributed to their high prices.
  5. Marketing and Branding: The Argyle mine has undertaken extensive marketing efforts to position pink diamonds as a luxury and exclusive product. This marketing strategy, along with the rarity and unique origin of the diamonds, has created a strong brand image and increased their perceived value.

It's worth noting that with the closure of the Argyle mine, the supply of pink diamonds will decrease even further, potentially leading to an increase in their prices in the future.

Morgan & Co have access to Argyle Pink Diamonds that are still available since the mine closed down. These pink diamonds are a wonderful investment. Contact the team at Morgan & Co for a free consultation to find out how you can purchase your own Argyle Pink Diamond. 

Are pink diamonds more expensive than blue diamonds?

In general, pink diamonds are more expensive than blue diamonds. The rarity and demand for pink diamonds contribute to their higher price tags compared to blue diamonds. Here are a few reasons why pink diamonds tend to be more expensive:

Rarity: Pink diamonds are significantly rarer than blue diamonds. While blue diamonds are also rare, pink diamonds are considered among the rarest of all coloured diamonds. The scarcity of pink diamonds in the market drives up their prices.

Intensity and Saturation: Pink diamonds come in various shades and intensities, ranging from light pink to vivid and intense pink. The more saturated and vibrant the pink colour, the more valuable the diamond becomes. Pink diamonds with intense and vivid pink hues command higher prices due to their rarity and beauty.

Market Demand: Pink diamonds have gained immense popularity and desirability among collectors, investors, and jewellery enthusiasts. The market demand for pink diamonds, driven by their unique and romantic appeal, contributes to their higher prices.

Supply Constraints: The primary source of pink diamonds, the Argyle diamond mine in Western Australia, is set to close in 2021. With the closure of the mine, the supply of pink diamonds will diminish further, potentially driving up their prices due to limited availability.

On the other hand, blue diamonds are also highly valuable and sought after, but they are generally more attainable than pink diamonds. The price of a blue diamond can vary depending on factors such as size, colour intensity, and overall quality.

It's important to note that diamond prices are influenced by multiple factors, including size, colour, clarity, and cut quality. Each diamond is unique, and prices can vary significantly based on these individual characteristics, regardless of colour.

Yellow Diamonds 

Yellow diamonds, also known as canary diamonds or fancy yellow diamonds, possess their own intriguing characteristics that set them apart from other coloured diamonds. Here are some interesting facts about yellow diamonds:

Natural Occurrence: Yellow diamonds are formed through the presence of nitrogen atoms during the diamond's formation process. The intensity of the yellow color can vary, ranging from subtle hints of yellow to vibrant and intense hues.

Color Grading: Yellow diamonds are graded based on their color intensity. The Gemological Institute of America (GIA) uses a grading scale that ranges from Fancy Light Yellow to Fancy Vivid Yellow, with the latter being the most vibrant and sought-after.

Rarity and Value: While yellow diamonds are more common than some other coloured diamonds, intense and vivid yellow diamonds of high quality are still relatively rare. As a result, they can command significant value in the market.

Popularity in Jewellery: Yellow diamonds have gained popularity in recent years and are frequently used in jewellery designs. They provide a vibrant burst of colour and can be paired with other diamonds or gemstones to create visually striking pieces.

Fancy Yellow Engagement Rings: Yellow diamonds are increasingly chosen as center stones for engagement rings. They offer a unique and unconventional alternative to traditional colorless diamonds, allowing for a personalized and eye-catching symbol of love.

Celebrity Appeal: Many celebrities have embraced yellow diamonds. For example, actresses Heidi Klum and Kelly Clarkson have been seen wearing stunning yellow diamond engagement rings, further popularising the beauty and allure of these gemstones.

Versatility in Design: Yellow diamonds are incredibly versatile when it comes to jewelry design. They can be set in various metal choices, such as white gold or yellow gold, and can be combined with other colored diamonds or gemstones to create stunning and one-of-a-kind pieces.

Symbolism: Yellow is often associated with joy, happiness, and positive energy. Yellow diamonds are believed to evoke feelings of optimism and warmth, making them a popular choice for those seeking a gemstone with a cheerful and uplifting vibe.

Yellow diamonds, with their vibrant and sunny hues, continue to captivate jewellery enthusiasts with their distinct beauty and charm. Their versatility, rarity, and symbolisation of positivity make them an enchanting choice for those who appreciate the allure of coloured diamonds.

Can you get fancy coloured diamonds in lab grown?

Yes, it is possible to obtain fancy coloured diamonds in lab-grown or synthetic form. Lab-grown diamonds are created through a process called chemical vapour deposition (CVD) or high-pressure, high-temperature (HPHT) methods. These lab-grown diamonds have the same chemical composition, crystal structure, and physical properties as natural diamonds.

Just like natural diamonds, lab-grown diamonds can exhibit various colours, including fancy colours like pink, blue, yellow, green, and more. The colour in lab-grown diamonds is achieved by introducing specific trace elements or altering the growth conditions during the diamond synthesis process.

Lab-grown fancy coloured diamonds have become increasingly popular as they offer an ethical and more affordable alternative to their natural counterparts. The ability to produce diamonds in specific colours through controlled conditions makes lab-grown fancy coloured diamonds more accessible to consumers who desire unique and vibrant hues.

It's important to note that when purchasing a lab-grown fancy coloured diamond, it is essential to ensure that the diamond is properly disclosed as lab-grown and that its colour origin is accurately represented. This transparency helps consumers make informed decisions and understand the value and characteristics of the diamond they are purchasing.

Famous People With Coloured Diamonds as Engagement Rings.

Several famous individuals have chosen coloured diamond engagement rings to symbolise their love and commitment. Here are a few notable examples:

Blake Lively: Actress Blake Lively received an engagement ring from actor Ryan Reynolds featuring a stunning light pink oval-shaped diamond.

Jennifer Lopez: Former baseball player Alex Rodriguez proposed to singer and actress Jennifer Lopez with a beautiful emerald-cut diamond engagement ring featuring a rare blue diamond centre stone.

Carrie Underwood: Country singer Carrie Underwood received a yellow diamond engagement ring from NHL player Mike Fisher, showcasing her love for coloured diamonds.

Anna Kournikova: Tennis star Anna Kournikova was proposed to by singer Enrique Iglesias with a unique pink pear-shaped diamond engagement ring.

Heidi Klum: Model and television personality Heidi Klum received a yellow diamond engagement ring from musician Tom Kaulitz, adding a vibrant touch to her ring.

Rebecca Romijn: Actor Jerry O'Connell proposed to Rebecca Romijn with a stunning yellow diamond engagement ring, reflecting her love for coloured diamonds.

These are just a few examples of celebrities who have chosen coloured diamond engagement rings. Each ring reflects the individual's personal style and preference for unique and distinctive choices.

What Colour Gold Do Pink Diamonds Look Best With?

Pink diamonds can be complemented by various colours of gold, depending on the desired aesthetic and personal preference. Here are a few options to consider:

Rose Gold: Rose gold, also known as pink gold, has a warm and romantic hue that can beautifully enhance the pink tones of a pink diamond. The soft pink colour of rose gold can create a harmonious and cohesive look, allowing the pink diamond to stand out.

White Gold: White gold provides a sleek and modern backdrop for a pink diamond. The cool white colour of the metal can create a striking contrast against the warm pink hue of the diamond, making it visually pop.

Yellow Gold: Yellow gold has a classic and traditional appeal that can complement the softness of a pink diamond. The warm tones of yellow gold can create a harmonious and elegant combination with the pink diamond.

Two-Tone Gold: A two-tone gold setting, such as a combination of white gold and rose gold or yellow gold, can add visual interest and dimension to the overall design. The contrasting colours can provide a unique and balanced look that enhances the beauty of the pink diamond.

Ultimately, the choice of gold colour depends on personal preference and the desired aesthetic. It's a good idea to try on different coloured gold settings and see which one enhances the pink diamond's beauty and complements your individual style the best.

By speaking with the team at Morgan & Co, they can assist you in choosing the right colour gold for your skin tone and help you when designing your forever piece. You can make a consultation, in-studio or virtual, here:


In conclusion, coloured diamonds have captivated the world with their extraordinary beauty and rarity. While white diamonds remain a timeless choice, coloured diamonds offer a unique and vibrant alternative that has gained significant popularity. Whether it's the mesmerising pink, the enchanting blue, or any other striking hue, coloured diamonds showcase nature's remarkable diversity and creativity.

The value and desirability of coloured diamonds stem from their scarcity and exquisite colour variations. Each coloured diamond possesses its own distinct charm, making it a cherished and sought-after gem. The rarity of coloured diamonds, especially in intense and vivid shades, contributes to their high prices and investment potential.

Furthermore, coloured diamonds allow for endless creativity in jewellery design. They can be paired with various metals, settings, and other gemstones to create breathtaking and personalised pieces. From engagement rings to statement necklaces, coloured diamonds add a touch of individuality and sophistication to any jewellery collection.

With advancements in technology, lab-grown coloured diamonds have emerged as an ethical and accessible alternative to natural coloured diamonds. These lab-grown gems offer a wide range of colours and provide an opportunity for more people to enjoy the beauty of coloured diamonds at a more affordable price point.

Whether natural or lab-grown, coloured diamonds continue to captivate the hearts of collectors, celebrities, and jewellery enthusiasts worldwide. Their timeless allure, rarity, and endless possibilities for creativity make coloured diamonds an enchanting and enduring symbol of luxury, beauty, and personal expression.

For an informative consultation, encompassing all things coloured diamonds, reach out to the experienced team at Morgan & Co for your free consultation

FAQ’s - Coloured Diamonds 

What makes coloured diamonds different from white diamonds?

Coloured diamonds, as the name suggests, exhibit vibrant hues ranging from soft pastels to intense and vivid shades, whereas white diamonds are colourless or near-colourless. The presence of trace elements or structural irregularities during diamond formation gives coloured diamonds their unique colours.

Are coloured diamonds more valuable than white diamonds?

The value of coloured diamonds depends on factors such as rarity, intensity of colour, size, and overall quality. In general, intense and vivid coloured diamonds, especially in rare colours like pink or blue, tend to be more valuable than white diamonds. However, the value ultimately depends on individual characteristics and market demand.

How are coloured diamonds graded?

Coloured diamonds are graded based on the intensity, hue, tone, and saturation of their colour. Grading laboratories, such as the Gemological Institute of America (GIA), use specialised grading systems to evaluate and categorise coloured diamonds.

What are some popular colours of coloured diamonds?

Popular colours of coloured diamonds include pink, blue, yellow, green, and orange. Each colour category can exhibit a wide range of shades and intensities, offering a diverse spectrum of choices.

Can coloured diamonds be treated to enhance their colour? 

In some cases, coloured diamonds can undergo treatments to enhance or modify their colour. However, it is crucial to ensure proper disclosure and transparency regarding any treatments applied to a coloured diamond.

Are lab-grown coloured diamonds as valuable as natural coloured diamonds? Lab-grown coloured diamonds possess the same physical and chemical properties as natural coloured diamonds. However, natural coloured diamonds often command higher prices due to their rarity and historical significance. Lab-grown coloured diamonds offer a more accessible and ethically sourced alternative.

Can coloured diamonds be used in engagement rings?

Absolutely! Coloured diamonds, including pink, blue, and yellow, can make stunning and unique choices for engagement rings. They add a touch of individuality and personal style to this special symbol of love and commitment.

Are coloured diamonds a good investment? 

Coloured diamonds can be considered as an investment option, particularly rare and high-quality stones. However, investing in diamonds requires thorough research, understanding of the market, and consideration of various factors such as rarity, quality, and trends in the diamond industry.

How can I ensure the authenticity of a coloured diamond? 

When purchasing a coloured diamond, it is essential to obtain a grading report from a reputable laboratory. GIA and other well-known gemological laboratories provide reliable and independent assessments of a diamond's characteristics, including its colour origin and authenticity.

June 25, 2023 — Morgan Gaskin