What’s The Most Expensive Material In The World?

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Endohedral fullerenes could help to produce the most accurate atomic clocks ever, and are the most expensive material ever produced. AVN Photo Lab/Shutterstock

Forget diamond, gold and plutonium, because scientists at Oxford University have created a material with a price tag that dwarfs all of the finest substances money can buy. At a recent auction, 200 micrograms of the material fetched £22,000 ($33,000), which works out at around $4.2 billion per ounce.