The sparkle's all in the brand

03 November 2019 - 00:02 By JOHN GAPPER

When Frances Gerety of the NW Ayer advertising agency coined the phrase "A diamond is forever" in 1947, her challenge was to persuade men in the US to buy diamond engagement rings.

She also helped her client De Beers in its relationship with famed New York jeweller Tiffany & Co...

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