A rare 242-carat rough diamond, which will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, is placed on scales during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

An employee shows gem-quality stones, including a rare 242-carat rough diamond that will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva TPX IMAGES OF THE DAY

A view shows gem-quality stones, including a rare 242-carat rough diamond that will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

A view shows a rare 242-carat rough diamond, which will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

An employee shows a rare 242-carat rough diamond, which will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

A view shows gem-quality stones, including a rare 242-carat rough diamond that will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

An employee shows a rare 242-carat rough diamond, which will be offered at the 100th international auction of Russian state-controlled diamond producer Alrosa, during a presentation in Moscow, Russia February 25, 2021. The diamond is one of the biggest gem-quality stones Alrosa has mined this century, the company said. Picture taken February 25, 2021. REUTERS/Tatyana Makeyeva

An art handler poses with "Girl With a Ballon" by Banksy, as preparations take place at Bonhams auction house ahead of their British Cool art sale, in London, Britain, February 22, 2021. REUTERS/John Sibley NO RESALES. NO ARCHIVES.

A signature is seen on 'Tower of the Katoubia Mosque' painted by former British Prime Minister Winston Churchill in 1943, as preparations take place at Christie's ahead of a livestream auction of Modern British Art on March 1, in London, Britain, February 17, 2021. REUTERS/Toby Melville

A tag is pictured on an outfit belonging to music recording artist Janet Jackson on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A pair of earrings which were a gift from Oprah Winfrey to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. Picture taken February 10, 2021. REUTERS/Mario Anzuoni

A selection of clothing belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A selection of clothing and other items belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A pair of earrings which were a gift from Oprah Winfrey to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A selection of clothing and other items belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A pair of shoes belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. Picture taken February 10, 2021. REUTERS/Mario Anzuoni

A pair of earrings which were a gift from Oprah Winfrey to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A selection of clothing belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. Picture taken February 10, 2021. REUTERS/Mario Anzuoni

Executive Director Martin J. Nolan is interviewed during a preview of music recording artist Janet Jackson's auction at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A top belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. Picture taken February 10, 2021. REUTERS/Mario Anzuoni

Executive Director Martin J. Nolan is interviewed during a preview of music recording artist Janet Jackson's auction at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A glove belonging to music recording artist Janet Jackson is on display during an auction preview at Julien's Auctions in Beverly Hills, California, U.S., February 10, 2021. REUTERS/Mario Anzuoni

A worker at Sotheby's auctions poses with Rembrandt's "Abraham and the Angels" during a preview where it is expected to fetch in excess of $20 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri

A worker at Sotheby's auctions puts Rembrandt's "Abraham and the Angels" back on the wall during a preview where it is expected to fetch in excess of $20 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri TPX IMAGES OF THE DAY

A worker at Sotheby's auctions takes Sandro Botticelli's "Young Man Holding a Roundel" from the wall during a preview where it is expected to fetch in excess of $80 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri

A worker at Sotheby's Auctions poses with Sandro Botticelli's "Young Man Holding a Roundel" during a preview where it is expected to fetch in excess of $80 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri

A worker at Sotheby's auctions takes Sandro Botticelli's "Young Man Holding a Roundel" from the wall during a preview where it is expected to fetch in excess of $80 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri

A worker at Sotheby's auctions puts Sandro Botticelli's "Young Man Holding a Roundel" back on the wall during a preview where it is expected to fetch in excess of $80 million USD in the Manhattan borough of New York City, New York, U.S., January 22, 2021. REUTERS/Carlo Allegri

Glass painter Tee Abkornburee paints a goblet at the Thomas Goode gallery in London, Britain, December 22, 2020. REUTERS/John Sibley

An employee of Sotheby's poses with a piece from the Napoleon I dinner service at Thomas Goode and Co ahead of their Sotheby's auction in London, Britain, December 22, 2020. REUTERS/John Sibley

A piece from the Napoleon I dinner service is seen at Thomas Goode and Co ahead of their Sotheby's auction in London, Britain, December 22, 2020. REUTERS/John Sibley

Churchill Commemorative Goblets celebrating his honorary American citizenship are seen next to his ledger book entry in the archives of Thomas Goode and Co, ahead of their Sotheby's auction, in London, Britain, December 22, 2020. REUTERS/John Sibley

Chairman of Thomas Goode and Co, Johnny Sandelson poses with a Ruby Vase commemorating the coronation of George VI inside their safe, ahead of their Sotheby's auction, in London, Britain, December 22, 2020. REUTERS/John Sibley

Chairman of Thomas Goode and Co, Johnny Sandelson looks through historical ledger books in their archive, ahead of their Sotheby's auction in London, Britain, December 22, 2020. REUTERS/John Sibley

Chairman of Thomas Goode and Co, Johnny Sandelson carries a Ruby Vase commemorating the coronation of George VI from their safe, ahead of their Sotheby's auction in London, Britain, December 22, 2020. REUTERS/John Sibley

A Coronation Cup designed to commemorate the coronation of Edward VIII before his abdication of the throne is seen ahead a Sotheby's auction, at the Thomas Goode gallery in London, Britain, December 22, 2020. REUTERS/John Sibley

A Coronation Cup designed to commemorate the coronation of Edward VIII before his abdication of the throne is seen ahead a Sotheby's auction, at the Thomas Goode gallery in London, Britain, December 22, 2020. REUTERS/John Sibley

Chairman of Thomas Goode and Co, Johnny Sandelson poses with a piece from the Queen Mary's Dolls' House Dinner Service ahead of their Sotheby's auction, at their gallery in London, Britain, December 22, 2020. REUTERS/John Sibley

Chairman of Thomas Goode and Co, Johnny Sandelson poses with pieces from the Queen Mary's Dolls' House ahead of their Sotheby's auction, at their gallery in London, Britain, December 22, 2020. REUTERS/John Sibley

A man places a bid during an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

A man looks at racing pigeons to be sold at an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

Men look at a racing pigeon during an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

A staff member places a racing pigeon on the stage during an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

People look at racing pigeons to be sold at an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

A racing pigeon sits in a cage before an auction organised by a pigeon racing club in Beijing, China November 27, 2020. Picture taken November 27, 2020. REUTERS/Thomas Peter

A signed S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen next to other memorabilia during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A signed S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen next to other memorabilia during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A signed S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A person holds a phone as a signed S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A signed jersey that belonged to soccer legend Diego Armando Maradona is seen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A T-shirt that belonged to soccer legend Diego Armando Maradona is seen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen on a screen next to other memorabilia during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A S.S.C Napoli team jersey that belonged to soccer legend Diego Armando Maradona is seen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca REFILE - CORRECTING TEAM

An Argentine national team jersey belonged to soccer legend Diego Armando Maradona is seen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

An Argentine national team jersey belonged to soccer legend Diego Armando Maradona is seen during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

An employee of Bolaffi national auction house shows a t-shirt belonged to soccer legend Diego Armando Maradona during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

An employee of Bolaffi national auction house shows a t-shirt belonged to soccer legend Diego Armando Maradona during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

An employee of Bolaffi national auction house shows a t-shirt belonged to soccer legend Diego Armando Maradona during an auction at the Bolaffi national auction house in Turin, Italy, December 9, 2020. REUTERS/Massimo Pinca

A worker shows a fish at the Belgian Vismijn fish auction market in Ostend, Belgium December 9, 2020. REUTERS/Yves Herman