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10 Largest Diamonds Ever Discovered

Want to know which are the largest diamonds ever discovered? White, yellow, pink, brown, blue, red, green… diamonds come in many colors, shapes, and carats, but all are equally fascinating to humankind. Known and valued since ancient times, these gemstones are not only precious, but also useful. In fact, the carbon allotrope is employed for industrial purposes due to its extreme hardness and high thermal conductivity, which is where the phrase ‘diamonds are forever’ gets its scientific meaning from.

Largest Diamonds Ever Discovered

But, let’s face it, diamonds main appeal to us is their beauty. Almost hypnotizing, these gemstones are the most valuable and coveted in the world; so much so, that they have been entangled in numerous conflicts and controversies. If you’ve watched the film Blood Diamond, starring Leonardo DiCaprio and Djimon Hounsou, you know that the diamond mining industry’s practices are indeed a contentious issue.

For those of you who are not familiar with the so called ‘blood diamonds’ or ‘conflict diamonds’, they are those mined in a war zone and then sold to finance the operations of a revolutionary group or a warlord’s activity. This type of mining and trading takes place in Central and West African countries, where the political instability since post-colonial times favored such activities. If you are further interested in the mining industry, you should check out our list on The Biggest Mines in the World: From Barrick Gold Corporation (USA) (ABX) to Freeport-McMoRan Copper & Gold Inc. (FCX).

In compiling this countdown of the largest diamonds ever discovered, we decided to rank diamonds by their weight as rough stones; that is to say, in the form they were originally found, before being cut into smaller pieces and sold. Although ‘diamond’ comes from a Greek word that means ‘unbreakable’, they can be cut and shaped. As a matter of fact, diamond cutting is a scientific discipline, even an artistic workmanship that has been perfecting its techniques for hundreds of years. The goal of diamond cutting is to achieve the maximum reflection of light, as well as preserving the largest portion of the stone possible.

Are you curious about the largest diamonds ever discovered thus far? Let’s take a look at the countdown!

10. The Jonker


Origin: South Africa

Found in: 1934

Original owner: Ernest Oppenheimer

Current owner: Anonymus

Cut by: Lazare Kaplan

Color: colorless, D-flawless

Estimated value: $2.25 million

Weight: 726 carats

9. The Vargas


Origin: Brazil

Found in: 1938

Current owner: Harry Winston

Cut by: Adrian Graselly

Color: colorless

Cut: Emerald cut

Weight: 729.6 carats

8. The Golden Jubilee


Origin: South Africa

Found in: 1985

Original owner: Herny Ho

Current owner: King Bhumibol Adulyadej of Thailand

Cut by: Gabriel Tolkowsky

Color: Unnamed brown

Cut: Fire rose cushion cut

Estimated value: $4-$12 million

Weight: 755 carats

7. The Woyie River


Origin: Sierra Leone

Found in: 1945

Color: colorless, D-flawless

Cut: Emerald

Weight: 770 carats

6. Millennium Star


Origin: Democratic Republic of Congo

Found in: 1990

Original owner: André Action Diakité Jackson (JFPI Corporation)

Current owner: De Beers Group

Cut by: Steinmetz Group

Color: Grade D colorless

Cut: Pear brilliant

Estimated value: $160 million

Weight: 777 carats

5. Incomparable Diamond


Origin: Democratic Republic of Congo

Found in: 1989

Original owner: De Beers Group

Current owner: Louis Glick

Cut by: Marvin Samuels

Color: Fancy brownish-yellow

Cut: Kite Shape

Estimated value: $12 million

Weight: 890 carats

4. Star of Sierra Leone


Origin: Sierra Leone

Found in: 1972

Original owner: Harry Winston

Cut by: Harry Vos

Color: colorless

Cut: Pear cut

Weight: 969 carats

3. Excelsior Diamond


Origin: South Africa

Found in: 1893

Original owner: assorted

Current owner: assorted

Cut by: Asscher

Color: G-colored

Cut: assorted, pear shape

Estimated value:  $2 million

Weight: 995.2 carats

2. Cullinan Diamond


Origin: South Africa

Found in: 1905

Original owner: Premier Diamond Mining Co.

Current owner: British Crown

Cut by: Asscher Brothers

Color: white

Cut: assorted (cuchions, pears, marquises)

Estimated value: $2 billion

Weight: 3106.75 carats

1. Sergio


Origin: Brazil

Found in: 1893

Color: black, carbonado

Weight: 3167 carats