A Cartier cabochon emerald and diamond necklace, commissioned by Merle Oberon in 1938 - part of the Denver Art Museum's Brilliant: Cartier in the 20th Century exhibition, which runs until 15 March 2015. © Cartier.

A Cartier cabochon emerald and diamond necklace, commissioned by Merle Oberon in 1938 - part of the Denver Art Museum's Brilliant: Cartier in the 20th Century exhibition, which runs until 15 March 2015. © Cartier

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