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A special exhibition for the
Summer Opening of the State Rooms,
Buckingham Palace, 2006
 
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The Royal Collection © 2008,
Her Majesty Queen Elizabeth II
RCIN 200146

The Williamson Diamond brooch

Cartier, London

The central diamond of 23.6 carats is the finest pink diamond in existence. It was excavated from a mine in Tanganyika (Tanzania) belonging to the Canadian geologist Dr John Williamson, who gave it as a wedding present to Princess Elizabeth in 1947. It was cut by Briefel and Lemer of London in 1948 and set in the centre of a new brooch designed by Frederick Mew of Cartier in 1952.