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Focused on Southern Africa, Petra’s diamonds are mined from orebodies that regularly yield some of the world’s most exquisite and valuable gemstones.

3 1 2 4 TANZANIA SOUTH AFRICA

1 Cullinan Mine

Produces large, high-quality white and very blue diamonds.

Revenue (US$ Million)* 136 66%
Total Production (MCTS)* 1.42

* Data from FY 2025

Cullinan Mine
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2 Finsch

Regularly produces highly commercial goods of over five carats, and occasionally produces over 50 carats and smaller gem-quality diamonds

Revenue (US$ Million)* 70 34%
Total Production (MCTS)* 0.98

* Data from FY 2025

Finsch
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Revenue by mine FY 2025 (%)

US$207m
  • Cullinan Mine 66%
  • Finsch 34%

Total rough diamond production by mine FY 2025 (%)

2.4 Mcts
  • Cullinan Mine 60%
  • Finsch 40%

Ownership of our mines

SOUTH AFRICAN MINES

Petra: 74%
Kago Diamonds: 14%
Itumeleng Petra Employee Trust: 12%

Unearthing the world’s rarest and most valuable diamonds:

1905

  • The Cullinan – Cullinan Mine

    At 3,106 carats in the rough, this is the largest gem diamond ever discovered. The Cullinan was discovered in January 1905 at the then named Premier Mine in South Africa and named after the chairman of the mining company, Thomas Cullinan. In November, 1907 it was formally presented to King Edward VII as a token of loyalty. The Cullinan yielded nine major stones and 96 smaller stones. Its two major stones sit within the British Crown Jewels: the Great Star of Africa (530 carats) in The Sovereign’s Sceptre and the Lesser Star of Africa (317 carats) in The Imperial State Crown.
1905
1905

  • The Great Star of Africa – Cullinan Mine

    At 530.20 carats, the Great Star of Africa (aka the Cullinan 1) is one of the largest cut diamonds in the world. It sits in the Royal Sceptre of the British Monarch. The Crown Jewels are located in the Tower of London and are one of the UK’s most popular tourist attractions.
1905
1947

  • The Williamson Pink – Williamson

    The Williamson Pink is considered the finest pink diamond ever discovered. It was found in October 1947 weighing 54 carats in the rough. The mine, then owned by the Canadian geologist and royalist Dr John Williamson, gave the diamond to Princess Elizabeth in 1947 as a wedding present. It was cut into a 23 carat round brilliant and set as the centre of a brooch in the form of a jonquil flower, designed and set by Cartier in 1953.
1947
1966

  • The Taylor Burton – Cullinan Mine

    The Taylor Burton diamond, at 240.8 carat in the rough and 69.42 carat polished, was made famous when it was purchased for Elizabeth Taylor by her husband Richard Burton. Elizabeth Taylor was one of the world’s most well known diamond collectors and famously commented that “big girls need big diamonds”.
1966
1986

  • The Golden Jubilee – Cullinan Mine

    At 545.65 carats polished, the Golden Jubilee is the largest cut diamond in the world. The Golden Jubilee Diamond was cut from a large brown diamond of 755.5 carats recovered at the Cullinan Mine in 1986. The diamond was purchased from De Beers by a group led by Henry Ho of Thailand in 1995.
1986
2016

  • The Oppenheimer Blue – Cullinan Mine

    The 14.62 carat Oppenheimer Blue is the largest fancy vivid blue diamond ever sold at auction. Named for, Sir Philip Oppenheimer of the De Beers family, the stone’s previous owner, the Oppenheimer Blue was sold at auction for US$57.5 million (US$3,935,826 per carat) in May 2016, making it, at the time, the most expensive diamond sold at auction.
2016
2022

  • The ‘Light of Africa’ – Cullinan Mine

    At 103 carats, the D-Flawless diamond named the ‘Light of Africa’ was cut from a 299.3carat rough unearthed from the Cullinan Diamond Mine. This was discovered in January 2021 as a Type IIa white diamond, which makes up less than 2% of all diamonds, and was exceptional quality in terms of colour and clarity. It sold for $20 million at Christie’s New York Magnificent Jewels sale in June 2022.
2022
2022
2022
2023

  • The Infinite Blue – Cullinan Mine

    Hailing from the Cullinan Mine, the ‘Infinite Blue’ came from the largest stone (25.75 cts) in the Letlapa Tala Collection (Letlapa Tala Collection), weighing 85.6 carats in total and originally found in September 2020. The ‘Infinite Blue’ was then cut to a 11.28 carat radiant, cut, and is a rare type IIb stone, accounting for less than 0.1% of all diamonds.  Described as one of the rarest, most valuable gems ever discovered, and a manifestation of the earth’s artistry. It fetched US$25.3 million at auction in Hong Kong in October 2023, the third highest price achieved for a blue diamond at auction in Asia. Read more about the Infinite Blue: The Infinite Blue | Sotheby’s (sothebys.com)
2023
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