Jacqueline Kennedy wore this black silk velvet and Chinese yellow silk satin evening dress by Chez Ninon for a White House state dinner honoring President Manuel Prado of Peru on September 19, 1961. It is now on display at the exhibition "Jacqueline Kennedy: The White House Years" at the Costume Institute of the Metropolitan Museum of Art in New York, April 22, 2001. (Photo by George DeSota/Newsmakers)
Jacqueline Kennedy wore this ivory duchesse silk satin and ruby-beaded silk organdy evening dress by Chez Ninon on two different occasions with Indian Prime Minister Nehru. It is now on display at the exhibition "Jacqueline Kennedy: The White House Years" at the Costume Institute of the Metropolitan Museum of Art in New York, April 22, 2001. (Photo by George DeSota/Newsmakers)
An Oleg Cassini Evening Dress Made Of Celadon Silk Jersey Is Seen In This Undated Photo From The Metropolitan Museum Of Art Exhibition "Jacqueline Kennedy: The White House Years." Kennedy Wore The Dress April 29, 1962 At A White House Dinner Honoring Nobel Prize Laureates Of The Western Hemisphere. The New York Exhibition Runs From May 1, 2001 To July 29, 2001. (Photo By Getty Images)
An Oleg Cassini evening gown made of ivory double-faced silk satin twill is seen in this undated photo from the Metropolitan Museum of Art exhibition "Jacqueline Kennedy: The White House Years." Kennedy wore the dress April 29, 1962 at a White House dinner honoring Nobel Prize Laureates of the Western Hemisphere. The New York exhibition runs from May 1, 2001 to July 29, 2001. (Photo by Metropolitan Museum of Art/Getty Images)
A Hubert De Givenchy Evening Dress From 1961 Is On Display In This Undated Photo From The Metropolitan Museum Of Art Exhibition "Jacqueline Kennedy: The White House Years." Kennedy Wore The Ivory Silk Ziberline Dress June 1, 1961 To A Dinner At The Palace Of Versailles In France. The New York Exhibition Runs From May 1, 2001 To July 29, 2001. (Photo By Getty Images)
First Lady Jacqueline Kennedy Wears A Chez Ninon Two-Piece Day Dress February 14, 1962 During A Nationally Televised Valentine's Day Tour Of The White House In Washington, Dc. The Famous Dress Will Be On Display At Metropolitan Museum Of Art Exhibition "Jacqueline Kennedy: The White House Years." The New York Exhibition Runs From May 1, 2001 To July 29, 2001. (Photo By Getty Images)
NEW YORK, NY - APRIL 25: This black "stone" bead, double strand necklace, worn by Jacqueline Kennedy when her husband announced his US presidential candidacy, was estimated at 200 USD and sold for 115,000 USD during the Sotheby's auction of the estate of Jacqueline Kennedy Onassis 25 April in New York. The auction is over a period of four days to accomodate 1,100 lots. (Photo credit should read SOTHEBY'S/AFP/Getty Images)
NEW YORK, NY - APRIL 25: This simulated diamond and colored stone necklace and matching earclips by Kenneth Jay Lane was estimated at 1000 USD and sold for 90,500 USD during the Sotheby's auction of the estate of Jacqueline Kennedy Onassis 25 April in New York. The auction is over a period of four days to accomodate 1,100 lots. (Photo credit should read SOTHEBY'S/AFP/Getty Images)
NEW YORK, NY - APRIL 25: This simulated pearl necklace worn by Jacqueline Kennedy while in residence at the White House sold for $190,000 USD during the Sotheby's auction of the estate of Jacqueline Kennedy Onassis 25 April in New York. The auction is over a period of four days with nine separate sessions to accomodate 1,100 lots. (Photo credit should read SOTHEBY'S/AFP/Getty Images)
NEW YORK, NY - APRIL 25: This 1962 file photo shows John F. Kennedy, Jr. playing with his mother's necklace at the White House. The simulated Pearl Necklace worn by Jacqueline Kennedy while in residence at the White House sold for USD 190,000 during the Sotheby's auction of the estate of Jacqueline Kennedy Onassis 25 April in New York. The auction is scheduled to take place over a period of four days with nine separate sessions to accomodate 1,100 lots. (Photo credit should read JFK LIBRARY/AFP/Getty Images)
NEW YORK, NY - APRIL 26: This work by Aaron Shikler was a study for the official portrait of Jacqueline Kennedy that hangs in the White House and will be sold during the Sotheby's auction of the estate of Jacqueline Kennedy Onassis 26 April. The painting is estimated at 10,000 USD. (Photo credit should read AFP/AFP/Getty Images)
NEW YORK, NY - APRIL 24: This undated photo released by Sotheby's auction house in New York shows the Lesotho diamond, a marquise-shaped diamond weighing 40.42 carats, mounted in platinum and signed by Harry Winston, which sold 24 April for 2,587,500 USD during the third session of the Jacqueline Kennedy Onassis auction in New York. The diamond, considered one of the world's most famous, was valued at 600,000 dollars at most. (Photo credit should read SOTHEBYS/AFP/Getty Images)
NEW YORK, UNITED STATES: Jewelry from the estate of Jacqueline Kennedy Onassis on preview at Sotheby's in New York on 14 December. At center is a ruby and diamond necklace from Van Cleef & Arpels, in front of it is a 40.42 carat Marquise diamond ring given to Onassis by her husbandf Aristotle. This and other items will be auctioned in April 1996. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)