Top 10 Most Expensive Diamonds in the World with Prices

Introduction

The world's most expensive diamonds are not only priceless and exquisite jewelry, but also stones with rich history, many interesting discoveries, royal origins, and record-breaking prices at auctions. Not only are the world's most expensive diamonds amazing pieces of jewelry that stand for luxury and wealth, but some diamonds are extra unique and rare, and their price reaches hundreds of millions dollars.

Do you ever wondered what the most expensive diamond in the world is, how much it costs, and what makes diamonds expensive? In this article we'll try to answer all these questions for you. We have made profound research about the world's most expensive diamonds and gathered all data about the price estimate and other factors that make diamonds valuable.

Unlike many papers, which simply mention some expensive diamonds, our guide will focus on the issue of high pricing of these diamonds, factors that determine the price, and lessons that may be drawn from it. Having carried out an extensive research in consideration of the price value, historical importance, rarity, and auctions of the most expensive diamonds in the world, we have been able to compile one ultimate guide. While other guides provide information on famous diamonds, our guide analyzes not only reasons for their high price value but also determination of the value of rare diamonds.

Why Are Some Diamonds Worth Hundreds of Millions?

Not all big diamonds are among the most valuable diamonds in the world. Some diamonds that weigh over 100 carats are sold at just a fraction of what famous diamonds such as the Cullinan, Hope, and Pink Star have been sold at. They are considered highly valuable because of their rare beauty and significance.

There are several reasons why some diamonds are sold at record prices:

Exceptional Rarity

Only an insignificant number of diamonds that occur in nature have clarity, coloring, and size that make them unique. Such diamonds can be formed by nature only after billions of years in certain geological settings.

Natural Fancy Colors

Whereas white diamonds make up the bulk of the jewelry industry’s products, there exist pink, blue, red, and green diamonds which are very rare compared to their white counterparts. In fact, there is only one red diamond found for every million white diamonds mined.

If you're interested in rare colored gemstones, explore our collection of Blue Diamonds

Historic Provenance

The history of the owner of the diamond is capable of dramatically increasing its price. Diamonds owned by kings, emperors, or other illustrious collectors are sold at much more money since in this case, you purchase not only a stone but also a priceless piece of history.

Record-Breaking Auctions

Prominent auction houses like Sotheby's or Christie's have shown many times that collectors are ready to make very high premiums for really outstanding diamonds. Competitive bidding may make the price of the diamond many times higher than expected.

Flawless Craftsmanship

Most of the most expensive diamonds of the world were cut by skilled craftsmen within several months or even years. Excellent cutting allows creating maximum brilliance, symmetry, fire of the diamond while losing minimal mass of it.

What Determines a Diamond's Value?

Diamond valuation by professional gemologists is based on various criteria accepted worldwide.

1. Carat Weight

Large diamonds are inherently scarcer than small diamonds. With an increase in carat weight, the price becomes proportional.

2. Color Grade

The colorless diamonds are still sought after; however, the natural colored diamonds—blue, pink, and red—are priced significantly higher owing to their rarity.

3. Clarity

Diamonds that contain fewer inclusions and blemishes are more valuable since they allow for more effective transmission of light through them.

4. Cut Quality

A diamond may be flawless, but it will still lack its true value if cut badly since it influences fire and sparkle.

5. Origin

The background of ownership, royalty links, museum displays, and history may significantly raise the price of a diamond above the price of a gemstone.

6. Demand for Auctions

Since there will be several collectors vying for a once-in-a-lifetime gemstone, the auction price may rise by tens of millions of dollars beyond expectations.

Which Is the Most Expensive Diamond in the World?

The Cullinan Diamond is considered to be one of the most expensive diamonds discovered so far, with a total value of more than $400 million if it were to be sold currently. The rough diamond weighs 3,106.75 carats and is said to have been discovered in South Africa in 1905, after which it was turned into some well-known gems, some of which make up part of the British Crown Jewels collection.

Quick Comparison Table of the Top 10 Most Expensive Diamonds

Note: Some historic diamonds like the Koh-i-Noor are not traded in the open market and the value of these gems is determined by the valuation of gem experts and collectors and not based on auctions.

Explore our Pear Shape Salt & Pepper Diamonds 

Top 3 Most Expensive Diamonds in the World

1. Cullinan Diamond

Estimated Value: Over $400 Million

• Carat Weight: 3,106.75 carats (Rough)
  
• Discovered: 1905
  
• Origin: South Africa

Cullinan diamond is considered to be one of the most expensive diamonds ever mined. This remarkable gemstone was mined in 1905 at the Premier Mine, weighing 3,106.75 carats in the rough, becoming the largest rough stone to have ever been discovered.

This precious stone was named after Thomas Cullinan who owned the mining company. After being discovered, the diamond was bought by the government of Transvaal Colony and was offered to King Edward VII as a gift.

How Was the Cullinan Diamond Cut?

Instead of staying intact as a single huge stone, the Cullinan was cut into nine large diamonds and about 100 small diamonds. The cutting process took many months to plan to achieve the best possible sparkle and weight preservation.

The most famous diamonds include:

• Cullinan I (The Great Star of Africa) – 530.2 carats
• Cullinan II (The Second Star of Africa) – 317.4 carats
• Seven additional principal gemstones ranging from 4 to 94 carats

Currently, some of these diamonds are part of the British Crown Jewels, thus making them some of the most recognizable gemstones in the world.

Why is the Cullinan Diamond so Valuable?

The Cullinan Diamond is an incredibly valuable diamond due to several aspects:

• Largest rough gem-quality diamond ever mined
• High clarity and crystalline structure
• Ownership by royalty historically
• Exquisite cutting technique
• Cultural and historical significance worldwide
• Cannot be replicated

Gemologists refer to the Cullinan Diamond as a one-in-a-lifetime find. Despite the advancement in mining technology, no other diamond has been mined like this one yet.

Expert Insight

One gem that provides evidence to support this statement is the Cullinan Diamond, which shows that just because a stone is large in size does not mean that it is valuable.

2. Koh-i-Noor

Estimated Value: More Than $200 Million (Estimated)

• Current Weight: 105.6 carats
  
• Origin: India

No other diamond comes close to the fascinating background that belongs to the Koh-i-Noor, which means “Mountain of Light.” In contrast to other modern diamonds whose value is mostly based on their price at auctions, the major part of the value of the Koh-i-Noor stems from its long association with different royal dynasties and its rich history.

Legend says that the diamond was mined from the famous Golconda Mines, and then changed many rulers – the Mughals, the Persians, the Afghans, the Sikhs, and finally the British Crown.

Nowadays, this diamond is probably the most controversial gemstone because of constant disputes concerning its history and cultural importance.

Why Isn't the Koh-i-Noor Sold?

Unlike most famous diamonds that set price records through auctions, the Koh-i-Noor is regarded as priceless since:

• It is one of the British Crown Jewels.
• It carries a lot of historical significance.
• It is treated as a national treasure.
• It has not been sold to the public ever.

Since there is no market transaction involved, all valuations are mere estimates, and many of them exceed the $200 million mark.

Why Is the Koh-i-Noor So Valuable?

Various elements make it legendary:

• Over 700 years of documented history
• Links with kings and monarchs
• Rarity of its Golconda origin
• Provenance of its history
• Recognition worldwide

Even though its carat size is not as large as many other diamonds today, the historical importance of the Koh-I-Noor makes it one of the most precious gemstones in the world.

3. Hope Diamond

Estimated Value: Around $250 Million

• Weight: 45.52 carats
  
• Color: Fancy Deep Blue
  
• Origin: India

Among all the celebrated gems, the Hope Diamond has to be one of the most recognizable due to its captivating dark blue color.

The gem was originally discovered in India hundreds of years ago and found its way to Europe through the merchant Jean-Baptiste Tavernier, after which it became part of the royal French family’s collection.

The diamond went missing after the French Revolution and reappeared after some time in its recut form and changed many hands before reaching the Smithsonian Institution where it attracts many visitors annually.

Why Is the Hope Diamond Famous?

The Hope Diamond is celebrated for more than its value:

• Extraordinary Fancy Deep Blue color
• Exceptional rarity
• Rich historical journey
• Museum significance
• Widespread public fascination

Its intense blue hue results from trace amounts of boron within the crystal structure—a geological phenomenon found in only a tiny fraction of natural diamonds.

The Legend of the "Cursed Diamond"

Over the centuries, stories emerged claiming the Hope Diamond carried a curse that brought misfortune to some of its owners. While historians largely consider these tales to be myths popularized by newspapers and authors, they have undeniably contributed to the diamond's enduring fame.

Why Is It Worth Hundreds of Millions?

The Hope Diamond combines several characteristics rarely found together:

• Natural Fancy Deep Blue color
• Historic provenance
• Museum prestige
• Global recognition
• Exceptional rarity

For collectors and gemologists alike, the Hope Diamond represents one of the finest examples of a naturally colored diamond ever discovered.

Diamonds – The World's Most Valuable Colored Diamonds

It is one of the greatest myths about very expensive diamonds that bigger is better. The fact is that many very expensive diamonds weigh below 15 carats but are worth more than diamonds weighing much more.

This is explained by the rarity factor. The proportion of diamonds with Fancy Vivid Pink coloration and Fancy Vivid Blue coloration in the global diamond industry output is just a small percentage.

4. Pink Star

Sold for $71.2 Million

• Carat Weight: 59.60 Carats
  
• Color Grade: Fancy Vivid Pink
  
• Origin: South Africa

The record of the most sensational auction in the history of gemstones belongs to the Pink Star Diamond. This is the largest Internally Flawless Fancy Vivid Pink diamond which weighs 59.60 carats.

Found in South Africa by De Beers in 1999, this diamond had a weight of about 132.5 carats in the rough state before becoming the stunning jewel that we know now.

Expert diamond cutters worked for almost two years to shape the rough diamond into its current form and maintain its vivid pink color.

Auction History

In 2017, the Pink Star sold for $71.2 million at a prestigious auction, becoming the most expensive diamond ever sold at auction at the time.

Its final selling price demonstrated how collectors value rarity over size.

Why Is the Pink Star So Valuable?

Several factors make this diamond extraordinary:

• Largest Fancy Vivid Pink diamond ever auctioned
• Internally Flawless clarity
• Exceptional color saturation
• Rare natural pink formation
• Historic auction record

Pink diamonds found in nature rank among the most rare gemstones in existence. According to experts, not many mined diamonds possess such a rich color of pink, which is why the Pink Star diamond is so valuable.

Expert Opinion

Unlike the white diamonds, which get most of their value from being clear, pink diamonds obtain most of their value from their intense color.

5. Oppenheimer Blue

Sold for $57.5 Million

• Carat Weight: 14.62 Carats
  
• Color Grade: Fancy Vivid Blue
  
• Origin: South Africa

Even though it is small, weighing 14.62 carats, the Oppenheimer Blue Diamond is considered to be one of the most expensive diamonds ever auctioned off.

Named after Sir Philip Oppenheimer, a key personality within the diamond industry, the amazing diamond gained global attention after being auctioned at an extraordinary price.

The blue diamond features a fancy vivid blue color that is extremely rare for diamonds.

Auction Price

At $57.5 million, the Oppenheimer Blue became a new standard for blue diamonds.

The cost of the gemstone demonstrates that a small diamond with a good color could be worth a lot more than a much bigger white diamond.

Why Are Blue Diamonds So Rare?

The reason why blue diamonds look this way lies in the presence of boron within their structure.

This natural phenomenon is very rare, which makes naturally colored blue diamonds one of the rarest gems around.

What Makes the Oppenheimer Blue Special?

• Fancy Vivid Blue color
• Exceptional transparency
• Excellent cut quality
• Strong historical provenance
• Record-breaking auction result

For collectors, natural blue diamonds represent one of the safest long-term luxury assets because of their limited global supply.

6. Graff Pink

Sold for $46.2 Million

• Carat Weight: 24.78 Carats
  
• Color Grade: Fancy Intense Pink

The Graff Pink Diamond is yet another stunning creation that helps understand the reason why naturally colored diamonds continue ruling the high-end auctions.

This amazing gemstone has a weight of 24.78 carats and is known for its beautiful Fancy Intense Pink color along with perfect clarity.

In 2010, the famous jeweler Laurence Graff bought this diamond at the cost of $46.2 million, making headlines in the entire jewelry world.

Upon buying this diamond, Graff made sure that it was re-polished for better clarity.

Why Is the Graff Pink So Valuable?

Its extraordinary price is driven by several factors:

• Fancy Intense Pink color
• High clarity grade
• Large size for a pink diamond
• Ownership by one of the world's leading jewelers
• Exceptional craftsmanship

Diamonds with weight exceeding 20 carats in pink are exceedingly rare. One that features remarkable clarity and color becomes even more rare, which accounts for the high competition among collectors over this diamond.

View of the Collector

The Graff Pink demonstrates that rarity plays a bigger role than size when it comes to valuable gemstones. Collectors prefer gemstones with remarkable color, clarity, and origin.

Auction Price Comparison

What does this imply?

The comparison between these auction sales provides insight into an important pattern:

• Blue diamonds usually have the highest price per carat since they are extremely rare.
• Pink diamonds always break records regarding sale prices because larger diamonds are extremely rare.
• Collectors prioritize color intensity, clarity, and history rather than carat weight.

That's how a 14.62 carat blue diamond fetches a higher price per carat compared to a bigger white diamond.

Key Takeaways

• Colored diamonds are one of the most scarce natural gems in existence.
• High-priced diamonds usually include Fancy Vivid Blue and Fancy Vivid Pink diamonds.
• Sometimes price per carat gives an indication of how rare a diamond is compared to just the carat weight.
• Auction records make up a big part of value.
• Good workmanship makes a lot of difference.

Shop our certified Loose Oval Diamond.

Diamonds- Record-Breaking Auction Timeline

As we've seen, rarity, color, provenance, and craftsmanship all influence a diamond's value. The final four diamonds on our list showcase these qualities in different ways. From record-breaking pink diamonds to the world's largest flawless colorless diamonds and the rarest red diamond ever discovered, these gemstones represent the pinnacle of nature's artistry.

7. Williamson Pink Star

Sold for $57.7 Million

• Carat Weight: 11.15 Carats
  
• Color Grade: Fancy Vivid Pink
  
• Origin: Tanzania

The Williamson Pink Star is an example of how rarity can sometimes be more important than size. Despite weighing only 11.15 carats, it was sold for an incredible $57.7 million dollars at an auction in 2022.

This unique gem is the product of cutting a 32-carat rough diamond that was mined from the Williamson Mine in Tanzania. This stone was awarded the rare combination of Fancy Vivid Pink color grading and Internally Flawless clarity grade.

Why Is It So Valuable?

The Williamson Pink Star is remarkable because it offers:

• Fancy Vivid Pink color
• Internally Flawless clarity
• Exceptional brilliance
• Rare Tanzanian origin
• Outstanding craftsmanship

In the bidding process, it fetched more than $5.17 million per carat, thus establishing a new world record for the highest amount paid per carat for a diamond or any other gemstone up to that point.

Insight by Experts

For collectors, the value of a stone depends more on quality than size. It is extremely rare to find a flawless pink diamond weighing over 10 carats.

8. De Beers Centenary Diamond

Estimated Value: Around $100 Million

• Carat Weight: 273.85 Carats
  
• Color: D Color (Colorless)
  
• Origin: South Africa

Contrary to most diamonds mentioned here, the De Beers Centenary Diamond has never been auctioned to the general public, but its approximate value is determined by its excellent qualities, size, and history.

This diamond was originally 599 carats heavy and found in the Premier Mine, South Africa. Years later after rigorous planning and polishing, it has become a beautiful 273.85 carat polished diamond with 247 facets—much more than the usual number of 57 to 58 facets in a brilliant-cut diamond.

Why Is It Famous?

The Centenary Diamond is admired because of its:

• Massive size
• D color (highest color grade)
• Internally and externally flawless quality
• Unique 247-facet design
• Exceptional brilliance

Unlike auction diamonds, this gemstone is famous for its gemological perfection rather than record-breaking sale prices.

Expert Insight

Gemologists often consider the Centenary Diamond one of the finest examples of precision cutting ever achieved. Its flawless quality makes it one of the benchmark stones used to demonstrate the highest standards in diamond craftsmanship.

9. De Beers Millennium Star

Estimated Value: Around $90 Million

• Carat Weight: 203.04 Carats
  
• Color Grade: D Color
  
• Origin: Democratic Republic of the Congo

The De Beers Millennium Star is considered one of the most aesthetically pleasing colorless diamonds ever made.

Initially mined as a 777 carat rough stone, it took over three years of meticulous designing, cutting, and polishing before it emerged as a pear-shaped 203.04 carat diamond. This diamond is considered the largest pear-shaped D colored diamond.

What Makes It Exceptional?

The Millennium Star combines nearly every characteristic collectors seek:

• D color
• Flawless clarity
• Exceptional symmetry
• Outstanding brilliance
• Remarkable size

Unlike many famous diamonds associated with royal history, the Millennium Star is celebrated primarily for its extraordinary gemological perfection.

Collector's Perspective

Although no public auction has established its exact market price, many experts estimate that if offered today, the Millennium Star would rank among the world's most expensive diamonds.

10. Moussaieff Red Diamond

Estimated Value: More Than $20 Million

• Carat Weight: 5.11 Carats
  
• Color Grade: Fancy Red
  
• Origin: Brazil

Initially, the Moussaieff Red Diamond might not seem very impressive due to its size relative to the other diamonds on the list. However, its rarity makes it a priceless gemstone. 

With just 5.11 carats, it is considered the largest Fancy Red diamond known to man. Red diamonds are extremely rare gemstones, as there are only a few of them known to exist.

It was first known as the Red Shield Diamond but was subsequently purchased by London jeweler Shlomo Moussaieff.

Why Is It So Expensive?

Its value comes from several unique qualities:

• Extremely rare Fancy Red color
• Largest known red diamond
• Excellent brilliance
• Historical significance
• Exceptional collector demand

Experts believe that if the Moussaieff Red Diamond were offered at auction today, it could challenge existing price-per-carat records due to the extreme scarcity of natural red diamonds.

Timeline of Record-Breaking Diamond Sales

Note: Historic diamonds such as the Cullinan, Koh-i-Noor, Hope Diamond, Centenary Diamond, and Millennium Star are generally not included because they have not been sold in comparable modern public auctions.

What Can We Learn from These Diamonds?

Looking across all ten diamonds, several clear trends emerge:

• Natural colored diamonds consistently command the highest prices per carat.
• Historical provenance can make a diamond priceless, even without a public sale.
• Auction competition often pushes prices far beyond pre-sale estimates.
• Gemological quality—including color, clarity, and cut—is just as important as size.
• Rarity remains the single most significant factor in determining long-term value.

These examples also show the diverse nature of the diamond industry. Although museum grade diamonds might never be in the possession of private investors, they still have access to rare diamonds that have their own special qualities.

Why Diamonds Become So Expensive? (The Expert Guide Competitors Miss)

Most papers end at this point by providing information about notable diamonds and their prices. But if you are curious about why some diamonds sell for $5,000 while others sell for $50 million, there is more to it than just weight.

Gemmologists, connoisseurs, and auction houses use a range of factors including science, scarcity, provenance, and demand to determine the value of diamonds. It not only provides an insight into why such expensive diamonds cost so much but also aids buyers in making more informed choices about natural diamonds.

1. What Makes a Diamond Expensive?

Most people think that big diamonds must be more expensive. However, while diamond size is an important aspect, it is not the only one.

Diamonds get their value from several different aspects:

✔ Rarity

The less common a diamond is, the more valuable it will be.

Such as:

• There are white diamonds mined every day.
• Black diamonds occur rarely.
• Blue diamonds are rare stones.
• Pink diamonds are rarer than blue.
• Natural red diamonds are the rarest ones of all.

That is why a 5-carat Fancy Red Diamond can cost more than a 100-carat white diamond.

✔ Color

Color is one of the biggest price drivers.

For white diamonds, the most valuable stones are those with little to no color.

However, naturally colored diamonds are a different story.

The rarest colors include:

Unlike treated diamonds, natural fancy-colored diamonds develop their color through unique geological conditions over billions of years.

✔ Clarity

Clarity measures how free a diamond is from internal inclusions and external blemishes.

• Grades range from:
• Flawless (FL)
• Internally Flawless (IF)
• VVS
• VS
• SI
• Included (I)

Many record-breaking diamonds, including the Pink Star and Williamson Pink Star, achieved exceptionally high clarity grades, significantly increasing their value.

✔ Cut

The cut of the diamond plays an important role in its brilliance.

It is possible for a perfect diamond to be lifeless due to bad cutting.

It takes months, sometimes years, for a master cutter to analyze a raw diamond before making the very first cut since one wrong move can make the diamond lose its worth.

✔ Provenance

Collectors often pay millions more for diamonds with famous ownership histories.

Examples include:

• Royal collections
• Historic empires
• Museum displays
• Celebrity ownership
• Record-breaking auctions

This historical significance cannot be recreated, making such diamonds even more desirable.

If you're interested in diamonds in their natural state, browse our Raw black diamond 

2. Natural Diamonds vs. Lab-Grown Diamonds

One question buyers frequently ask is whether lab-grown diamonds can ever become as valuable as natural diamonds.

The answer is not in the same way.

Natural Diamonds

• Form naturally over billions of years beneath the Earth's surface.
• Each stone is unique.
• Limited supply.
• Greater rarity.
• Strong collector and investment appeal.

Lab-Grown Diamonds

• Created in controlled laboratory environments.
• Chemically similar to natural diamonds.
• Increasing production each year.
• Primarily valued for jewelry rather than rarity.
• Typically have lower resale value due to abundant supply.

While lab-grown diamonds are an excellent choice for many jewelry buyers, the world's most expensive diamonds are all natural because their rarity cannot be replicated.

3. Which Diamond Color Is the Most Valuable?

Contrary to popular belief, the most expensive diamonds are not always colorless.

The value of a diamond often depends on the rarity of its color.

Approximate Rarity Ranking

1. Red Diamond
2. Blue Diamond
3. Pink Diamond
4. Green Diamond
5. Violet Diamond
6. Orange Diamond
7. White Diamond
8. Yellow Diamond
9. Brown Diamond

The exact price will vary based on the color saturation, clarity, cut, and size, but stones that have bright natural colors tend to be more valuable.

4. Are Black Diamonds Valuable?

When talking about unique diamonds, black diamonds should be mentioned separately.

As compared to regular transparent diamonds, natural black diamonds are distinguished by their distinctive structure and appearance.

Once ignored as jewelry gems for a long time, nowadays they gain popularity when being used for luxury engagement rings, menswear, and custom designs.

Why Do Buyers Prefer Natural Black Diamonds?

• Unique look
• Rarity of nature
• Contemporary chic design
• Outstanding durability
• Growing collectors' interest

Natural black diamonds are very popular among customers who desire to stand out of the crowd of those wearing regular diamonds.

Browse our collection of Natural Loose Black Diamonds

5. What Are Rough Diamonds?

Before becoming polished masterpieces, every diamond begins as a rough crystal.

Rough diamonds are prized by:

• Gem collectors
• Jewelry manufacturers
• Educational institutions
• Investors
• Custom jewelry designers

Many famous diamonds—including the Cullinan Diamond and Pink Star—started as rough stones before expert cutters transformed them into legendary gems.

6. Can Rare Diamonds Be a Good Investment?

Rare diamonds have always been collected by collectors due to the uniqueness of such diamonds. Rare natural diamonds with excellent color, clarity, and origin have been able to increase in value over time.

However, diamonds should not be perceived as a safe investment option.

Potential investors must take into account the following criteria:

• Grading reports
• Demand
• Origin
• Rarity
• Liquidity
• Investment horizon

Collectors usually buy rare diamonds as unique collectibles that provide satisfaction rather than money.

Expert Advice: If you are thinking of buying rare and expensive diamonds, get a certificate from reputable gemological labs and contact the specialists.

7. Diamond Dust: The Hidden Side of the Diamond Industry

It is not all diamonds that are made for use as jewelry.

Diamonds are sometimes transformed into diamond dust – an extremely hard material applied for precise cutting, grinding, polishing, and drilling among other technological uses. Due to the fact that diamond is the hardest natural substance, diamond dust is an essential component of manufacturing and engineering industries.

For more information, visit our Diamond Dust 

Expert Buying Tips Before Purchasing a Rare Diamond

Regardless of whether it is a collectible stone or a loose natural diamond you wish to purchase, the following guidelines should always apply:

• ✔ Check its authenticity with a gemological grading certificate.
• ✔ Learn what 4Cs stand for: Cut, Color, Clarity, and Carat Weight.
• ✔ Learn the diamond’s origin and history if possible.
• ✔ Learn to compare diamonds in terms of rarity and quality rather than only their sizes.
• ✔ Buy diamonds from trustworthy sellers.
• ✔ Make sure the diamond corresponds to your intention: it can be a gift, collectible, or simply a jewelry diamond.

Knowing the criteria of value of a diamond will help you understand how some gems achieve legendary status and some remain simply beautiful. In the last section, we will provide answers to the most common questions about the world's most expensive diamonds.