A 1k white gold and diamond monogram pendant that belonged to American gangster Al Capone is displayed ahead of an auction in Sacramento, California, U.S., October 5, 2021. Picture taken October 5, 2021. REUTERS/Fred Greaves

A 1k white gold and diamond matchbook cover, that belonged to American gangster Al Capone is displayed ahead of an auction in Sacramento, California, U.S., October 5, 2021. Picture taken October 5, 2021. REUTERS/Fred Greaves

A platinum and diamond initialed pocket knife that belonged to American gangster Al Capone is displayed ahead of an auction in Sacramento, California, U.S., October 5, 2021. Picture taken October 5, 2021. REUTERS/Fred Greaves

Ryan Shearman, Co-founder and of CEO Aether diamonds, which are made from captured CO2, speaks with Reuters during an interview at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

An employee wearing a white glove displays various Aether diamonds made from captured CO2 at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

Ryan Shearman, Co-founder and of CEO Aether diamonds, which are made from captured CO2, speaks with Reuters during an interview at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

Various Aether diamonds made from captured CO2 are pictured at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A ring set with an Aether diamond made from captured CO2 is pictured at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A worker sets an Aether diamond made from captured CO2 into a ring at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

Various Aether diamonds made from captured CO2 are pictured at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A worker sets an Aether diamond made from captured CO2 into a ring at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

Various Aether diamonds made from captured CO2 are pictured at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A quality control worker inspects a ring set with an Aether diamond made from captured CO2, at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A ring set with an Aether diamond made from captured CO2 is pictured at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A worker sets an Aether diamond made from captured CO2 into a ring at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A jewelry polisher buffs a ring to be set with an Aether diamond, made from captured CO2 at the RFG Manufacturing Riviera jewelry design facility in Manhattan in New York City, New York, U.S., September 30, 2021. Picture taken September 30, 2021. REUTERS Mike Segar

A man takes a picture of the painting "Diamond dust shoes" from 1980 by artist Andy Warhol and the sculpture "Baton twirler" from 1971 by artist Duane Hanson at the Art Basel art fair in Basel, Switzerland September 21, 2021. REUTERS/Arnd Wiegmann

Visitors are seen behind the painting "Diamond dust shoes" from 1980 by artist Andy Warhol and the sculpture "Baton Twirler" from 1971 by artist Duane Hanson at the Art Basel art fair in Basel, Switzerland September 21, 2021. REUTERS/Arnd Wiegmann

Oded Mansori holds an over 1,000-carat uncut stone by Lucara Diamond as he poses during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Rafael Papismedov holds an over 1,000-carat uncut stone by Lucara Diamond poses during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

An over 1,000-carat uncut stone by Lucara Diamond is pictured during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

An over 1,000-carat uncut stone by Lucara Diamond is pictured during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

An over 1,000-carat uncut stone by Lucara Diamond is pictured during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Oded Mansori holds an over 1,000-carat uncut stone by Lucara Diamond during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Rafael Papismedov and Oded Mansori pose with an over 1,000-carat uncut stone by Lucara Diamond pose during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Oded Mansori holds an over 1,000-carat uncut stone by Lucara Diamond during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Oded Mansori holding an over 1,000-carat uncut stone by Lucara Diamond poses during a press availability in New York City, New York, U.S., September 20, 2021. REUTERS/David 'Dee' Delgado

Tokyo 2020 Olympics gold medalist Yulimar Rojas holds the Diamond League trophy as she is welcomed upon arrival at Simon Bolivar International Airport in Maiquetia, Venezuela, September 14, 2021. REUTERS/Leonardo Fernandez Viloria

Pietro Bajocchi, the 70-year-old owner of Bajocchi Jewellers, looks at a diamond ring at the Bajocchi Jewellers, one of the oldest jewellery businesses in the country, founded in the 1900s and established by the Italian Bajocchi family, in downtown Cairo, Egypt, September 13, 2021. Picture taken September 13, 2021. REUTERS/Amr Abdallah Dalsh

Raul Bajocchi, the 37-year-old owner of Bajocchi Jewellers, looks at a diamond ring at the Bajocchi Jewellers, one of the oldest jewellery businesses in the country, founded in the 1900s and established by the Italian Bajocchi family, in downtown Cairo, Egypt, September 13, 2021. Picture taken September 13, 2021. REUTERS/Amr Abdallah Dalsh

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 A woman performs during the closing ceremony REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Sweden's Armand Duplantis celebrates winning the men's pole vault REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Athletes celebrate with their trophies after the competition REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Sweden's Armand Duplantis in action during the men's pole vault REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Sweden's Armand Duplantis during the men's pole vault REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Sweden's Armand Duplantis in action during the men's pole vault REUTERS/Arnd Wiegmann TPX IMAGES OF THE DAY

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Italy's Gianmarco Tamberi in action during the men's high jump REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Switzerland's Mujinga Kambundji after the women's 200m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Kenneth Bednarek of the U.S. on his way to win the men's 200m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Kenneth Bednarek of the U.S. celebrates winning the men's 200m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Namibia's Christine Mboma celebrates winning the women's 200m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm in his way to win the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Sweden's Armand Duplantis in action during the men's pole vault REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm celebrates winning the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm reacts before the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Norway's Karsten Warholm reacts before the men's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Netherland's Femke Bol on her way to win the women's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Netherland's Femke Bol on her way to win the women's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Netherland's Femke Bol on her way to win the women's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Netherland's Femke Bol with Switzerland's Lea Sprunger after the women's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Switzerland's Lea Sprunger reacts after the women's 400m hurdles REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Kenya's Emmanuel Kipkurui Korir celebrates winning the men's 800m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Kenya's Emmanuel Kipkurui Korir celebrates winning the men's 800m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Kenya's Emmanuel Kipkurui Korir on his way to win the men's 800m REUTERS/Arnd Wiegmann

Athletics - Diamond League - Zurich - Letzigrund, Zurich, Switzerland - September 9, 2021 Britain's Keely Hodgkinson on her way to win the women's 800m REUTERS/Arnd Wiegmann