Apr 14, 2025 · 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 pe... Oct 25, 2024 · The most expensive items in the world include a $735 million yacht, a $450.3 million painting, a $150 million diamond and a $142 million car, among others. Discover the most expensive items across every category — from watches to art to space missions. Updated regularly with real market data. Sep 21, 2025 · From billion-dollar yachts to diamond watches and rare art, explore 15 of the most expensive things ever purchased by the world's wealthiest people
