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LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla Duchess of Cornwall arrives in Royal heirloom diamond tiara, necklace and earrings, at a banquet in Buckingham Palace on October 25, 2005 in London, England. (Photo by Pool/Tim Graham Picture Library/Getty Images)

LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS):  Camilla Duchess of Cornwall arrives in Royal heirloom diamond tiara, necklace and earrings, at a banquet in Buckingham Palace on October 25, 2005 in London, England. (Photo by Pool/Tim Graham Picture Library/Getty Images)

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LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla Duchess of Cornwall wears a Royal heirloom diamond tiara, necklace and earrings, at a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla Duchess of Cornwall wears a Royal heirloom diamond tiara, necklace and earrings, at a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

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LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla Duchess of Cornwall arrives in Royal heirloom diamond tiara, necklace and earrings, with Prince Charles The Prince of Wales at a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS):  Camilla Duchess of Cornwall arrives in Royal heirloom diamond tiara, necklace and earrings, with Prince Charles The Prince of Wales at a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

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LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla, Duchess of Cornwall and Prince Charles The Prince of Wales attend a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS):  Camilla, Duchess of Cornwall  and Prince Charles The Prince of Wales attend a banquet in Buckingham Palace on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

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LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS): Camilla Duchess of Cornwall, wearing a Royal heirloom of diamond tiara, necklace and earrings, attends a banquet in Buckingham Palace with Prince Philip The Duke of Edinburgh, Queen Elizabeth II and Crown Prince Haakon of Norway on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)

LONDON - OCTOBER 25: (NO UK SALES FOR 28 DAYS):  Camilla Duchess of Cornwall, wearing a Royal heirloom of diamond tiara, necklace and earrings, attends a banquet in Buckingham Palace with Prince Philip The Duke of Edinburgh, Queen Elizabeth II and Crown Prince Haakon of Norway on October 25, 2005 in London, England. This is the first time that Camilla has worn the royal tiara and only the third time the priceless jewelry has been worn in public. (Photo by Pool/Tim Graham Picture Library/Getty Images)