BBC Science Focus compiled a list of the most expensive materials, including antimatter at $59.8 trillion per gram and nitrogen atom-based endohedral fullerenes at $134 million per gram. Californium-252, used in nuclear reactors, costs $25.6 million per gram. Samples from the asteroid Bennu are valued at $9.6 million per gram. Red diamonds, emeralds, rubies, and sapphires made the list, priced at $483,000 per gram. Helium-3 is also included, costing $96,000 per gram. The magazine notes “that since many of the substances here aren’t traded as common commodities, price estimates can vary widely.” (newser)
Phone Topic: What’s the most expensive thing you’ve ever owned?
