Here are some of the major jewel heists in recent history:
_ February 2008: Masked thieves drill a tunnel into the Damiani showroom in Milan, Italy, making off with gold, diamonds and rubies worth an estimated $20 million, though Damiani will not confirm the worth. Nine men were arrested in December in connection with the robbery.
_ October 2007: Thieves steal about $28.4 million in gems from the Harry Winston store in central Paris.
_ March 2007: 120,000 karats in diamonds, worth $28 million, are stolen from open safe-deposit boxes in an ABN Amro bank in Antwerp.
_ March 2004: Twelve pieces of jewelry worth about $31.5 million, including the 125-carat "Comtesse de Vendome" diamond necklace, are stolen from a store in Tokyo's Ginza district.
_ February 2003: Thieves empty 123 safe-deposit boxes at Antwerp Diamond Center in Belgium, netting an estimated $100 million in the world's largest safe-deposit box theft.
_ 1994: Machine-gun-toting thieves take $45 million in gems from the Carlton Hotel in Cannes on the French Riviera.
_ March 1984: $15.4 million in jewels and gold are stolen when thieves crack a safe in a Hong Kong garment factory.
Source: AP and news reports. Associated Press researcher Judy Ausuebel compiled this report.