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Cuno Amiet (1868-1961)

David Weiss (1946-2012)

Les événements marquants de Roger Federer

178 Objets

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SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays "Bleu Royal", a rare 17,61 carats internally flawless fancy vivid blue pear shaped diamond, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 35 to 50 million USD.The auction will take place in Geneva, on November 07, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Rolex wristwatch worn by Marlon Brando in the 1979 movie "Apocalypse Now", on the back of which the actor engraved his signature to avoid having it swapped accidentally, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 1,000,000 to 2,000,000 millions USD.The auction will take place in Geneva, on November 06, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays "Bleu Royal", a rare 17,61 carats internally flawless fancy vivid blue pear shaped diamond, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 35 to 50 million USD.The auction will take place in Geneva, on November 07, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays "Bleu Royal", a rare 17,61 carats internally flawless fancy vivid blue pear shaped diamond, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 35 to 50 million USD.The auction will take place in Geneva, on November 07, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Rolex wristwatch worn by Marlon Brando in the 1979 movie "Apocalypse Now", on the back of which the actor engraved his signature to avoid having it swapped accidentally, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 1,000,000 to 2,000,000 millions USD.The auction will take place in Geneva, on November 06, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays "Bleu Royal", a rare 17,61 carats internally flawless fancy vivid blue pear shaped diamond, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 35 to 50 million USD.The auction will take place in Geneva, on November 07, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Rolex wristwatch worn by Marlon Brando in the 1979 movie "Apocalypse Now", on the back of which the actor engraved his signature to avoid having it swapped accidentally, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 1,000,000 to 2,000,000 millions USD.The auction will take place in Geneva, on November 06, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Rolex wristwatch worn by Marlon Brando in the 1979 movie "Apocalypse Now", on the back of which the actor engraved his signature to avoid having it swapped accidentally, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 1,000,000 to 2,000,000 millions USD.The auction will take place in Geneva, on November 06, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Rolex wristwatch worn by Marlon Brando in the 1979 movie "Apocalypse Now", on the back of which the actor engraved his signature to avoid having it swapped accidentally, during a preview at the Christie's, in Geneva, Switzerland, Thursday, November 02, 2023. It is estimated to sell between 1,000,000 to 2,000,000 millions USD.The auction will take place in Geneva, on November 06, 2023. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

Visitors look jewels displayed in display case during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A display case of jewels is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

An employee of Christie's displays a 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), in display case, during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

The Sunrise Ruby and Diamond ring of 25.59 carats by Cartier, estimated between 14,000,000 - 18,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

The Sunrise Ruby and Diamond ring of 25.59 carats by Cartier, estimated between 14,000,000 - 18,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A snake necklace a suite of Emerald, Turquoise and Diamond, with a pair of earrings and a ring by Bulgari, estimated between 900,000 - 1,400,000 CHF (Swiss Francs), is displayed in display case during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

Visitors look of the Bulgari jewels displayed in display case during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

The Sunrise Ruby and Diamond ring of 25.59 carats by Cartier, estimated between 14,000,000 - 18,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

An employee of Christie's displays the Great Mogul Emerald and Diamond Necklace by Harry Winston, estimated between 450,000 - 640,000 CHF (Swiss Francs), in display case, during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

The Sunrise Ruby and Diamond ring of 25.59 carats by Cartier, estimated between 14,000,000 - 18,000,000 CHF (Swiss Francs), is pictured, during a preview of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

Visitors look jewels displayed in display case during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A woman takes a photo the 90.36 carat Briolette of India Diamond Necklace by Harry Winston, estimated between 9,000,000 - 14,000,000 CHF (Swiss Francs), is pictured, during the exhibition of "The World of Heidi Horten" the 700 pieces jeweooery collection of the late Austrian billionaire Heidi Horten widow of businessman Helmut Horten, at Christie's prior the auction sale, in Geneva, Switzerland, Monday, May 8, 2023. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

An extraordinary transparent sapphire crystal and titanium skeletonised Richard Mille Tourbillon Sapphire limited edition, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 2,500,000 - 4,500,000 Swiss Francs.The auction will take place in Geneva, on November 06, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A unique Ferrari Centigraphe Souverain Platinum Model chronograph by F.P. Journe, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 800,000 - 1,400,000 Swiss Francs.The auction will take place in Geneva, on November 06, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A unique Ferrari Centigraphe Souverain Platinum Model chronograph by F.P. Journe, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 800,000 - 1,400,000 Swiss Francs.The auction will take place in Geneva, on November 06, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a fancy vivid pink modified pear brilliant-cut diamond called "The Fortune Pink" of 18,18 carat, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 25,000,000 - 35,000,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a Diamond riviera necklace pear brilliant-cut diamond of 10,33 carats, main old-cut diamonds of 7.02 and 4.80 carats, circular brilliant-cut of 4.18 carats, old-cut diamonds, gold and silver, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 550,000 - 750,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a Diamond riviera necklace pear brilliant-cut diamond of 10,33 carats, main old-cut diamonds of 7.02 and 4.80 carats, circular brilliant-cut of 4.18 carats, old-cut diamonds, gold and silver, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 550,000 - 750,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a Diamond riviera necklace pear brilliant-cut diamond of 10,33 carats, main old-cut diamonds of 7.02 and 4.80 carats, circular brilliant-cut of 4.18 carats, old-cut diamonds, gold and silver, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 550,000 - 750,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a Diamond riviera necklace pear brilliant-cut diamond of 10,33 carats, main old-cut diamonds of 7.02 and 4.80 carats, circular brilliant-cut of 4.18 carats, old-cut diamonds, gold and silver, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 550,000 - 750,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays a Diamond riviera necklace pear brilliant-cut diamond of 10,33 carats, main old-cut diamonds of 7.02 and 4.80 carats, circular brilliant-cut of 4.18 carats, old-cut diamonds, gold and silver, during a preview at the Christie's, in Geneva, Switzerland, Wednesday, November 02, 2022. It is estimated to sell between 550,000 - 750,000 Swiss Francs.The auction will take place in Geneva, on November 08, 2022. (KEYSTONE/Martial Trezzini)

SCHWEIZ AUKTION CHRISTIE'S

TOPSHOT - A picture taken on May 6, 2022 in Geneva shows "The Red Cross Diamond" a 205,07 carats fancy intense yellow, cushion-shaped diamond that will be offered on May 11, 2022 in Geneva by Christie's auction house. - Part of the proceeds of the sale of the diamond will benefit the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Furstenberg Tiara" (estimate: Euro 383900-575800), a pearl and diamond tiara bearing the mark of the famous Austrian jeweller Gustav Flach, that will be offered for sale on May 11, 2022 in Geneva by Christie's auction house. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Furstenberg Tiara" (estimate: Euro 383900-575800), a pearl and diamond tiara bearing the mark of the famous Austrian jeweller Gustav Flach, that will be offered for sale on May 11, 2022 in Geneva by Christie's auction house. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee displays "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Red Cross Diamond" a 205,07 carats fancy intense yellow, cushion-shaped diamond that will be offered on May 11, 2022 in Geneva by Christie's auction house. - Part of the proceeds of the sale of the diamond will benefit the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

A picture taken on May 6, 2022 in Geneva shows "The Red Cross Diamond" a 205,07 carats fancy intense yellow, cushion-shaped diamond that will be offered on May 11, 2022 in Geneva by Christie's auction house. - Part of the proceeds of the sale of the diamond will benefit the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Rock", a 228,31 carats pear-shaped white diamond (estimate: USD 20,000,000-30,000,000) mined and polished in South Africa over two decades ago, which is the largest white diamond ever to appear for sale at auction, according to Christie's auction house. - The Rock will be offered on May 11, 2022 in Geneva during a "Christie's Magnificent Jewels" sale, alongside a yellow diamond, with part of the proceeds going to the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Rock", a 228,31 carats pear-shaped white diamond (estimate: USD 20,000,000-30,000,000) mined and polished in South Africa over two decades ago, which is the largest white diamond ever to appear for sale at auction, according to Christie's auction house. - The Rock will be offered on May 11, 2022 in Geneva during a "Christie's Magnificent Jewels" sale, alongside a yellow diamond, with part of the proceeds going to the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Rock", a 228,31 carats pear-shaped white diamond (estimate: USD 20,000,000-30,000,000) mined and polished in South Africa over two decades ago, which is the largest white diamond ever to appear for sale at auction, according to Christie's auction house. - The Rock will be offered on May 11, 2022 in Geneva during a "Christie's Magnificent Jewels" sale, alongside a yellow diamond, with part of the proceeds going to the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

This picture taken on May 6, 2022 in Geneva shows "The Rock", a 228,31 carats pear-shaped white diamond (estimate: USD 20,000,000-30,000,000) mined and polished in South Africa over two decades ago, which is the largest white diamond ever to appear for sale at auction, according to Christie's auction house. - The Rock will be offered on May 11, 2022 in Geneva during a "Christie's Magnificent Jewels" sale, alongside a yellow diamond, with part of the proceeds going to the International Committee of the Red Cross. (Photo by Fabrice COFFRINI / AFP) (KEYSTONE/AFP/FABRICE COFFRINI)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901and "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) and The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901and "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) and The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)

SCHWEIZ AUKTION CHRISTIE'S

A Christie's employee holds the "Red Cross", a fancy intense yellow, cushion-sharp 205.07 carats diamond returning to Christie?s saleroom for the third time since its mining in 1901and "The Rock" a white diamond of 228,31 carats who is the largest white diamond ever seen throughout auction market history, during a preview at Christie's, in Geneva, Switzerland, Friday, May 6, 2022. The Rock is estimated between 19,000,000 - 30,000,000 CHF (Swiss Francs) and The Red Cross Diamond will sold as hightlight of the Geneva Magnificent Jewels auction on 11 May 2022. (KEYSTONE/Salvatore Di Nolfi)