A Diamond Is Forever, but only since 1947.

For centuries, engagement rings came in many forms — colored gemstones (sapphires, rubies, or emeralds), plain gold bands, or sometimes no ring at all. Diamonds weren’t the obvious choice.

Then the Great Depression hit. Diamond sales collapsed, and De Beers — the world’s mining giant — was sitting on a stockpile of gems no one wanted.

They didn’t just need more buyers. They needed to make diamonds non-negotiable.

In 1938, De Beers hired N.W. Ayer & Son advertising agency has one mission: to make the diamond ring the ultimate symbol of love.

The plan?

• Connect diamonds with romance and lifelong commitment.
• Place them on the fingers of Hollywood stars and royal brides.
• Feed the media a steady stream of glamorous love stories — always with a diamond at the centre.
• Repeat this message so often that it would feel like an ancient tradition.

And in 1947, copywriter Frances Gerety coined the now-legendary four words that crystallised the campaign: A Diamond Is Forever.

The impact was staggering. By the 1980s, diamond engagement rings had gone from a rarity to the global standard — a tradition that had barely existed 40 years earlier.

Generations grew up believing they had always been part of weddings. But this wasn’t history. It was marketing.

Marketing lesson: The most powerful campaigns don’t just sell products. They reshape culture. They make a choice that feels like destiny.

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