Which iconic slogan was created in 1948 for De Beers to transform the diamond industry and essentially invent the tradition of diamond engagement rings?

Behind many of the world's greatest inventions and discoveries were marketing campaigns that helped them gain widespread adoption. Some product slogans have become so iconic that they've permanently entered our cultural lexicon and helped transform innovations from obscure inventions to household necessities. Test your knowledge of the marketing brilliance that propelled these groundbreaking products to success!

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• "A Diamond is Forever"
• "Diamonds Are a Girl's Best Friend"
• "The Precious Stone of Love"
• "Every Kiss Begins With..."

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