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Inioluwa Ogunleye 3 days ago

Overview

The most expensive materials on Earth include theoretical Antimatter (trillions per gram), manufactured Endohedral Fullerenes (around $134M/gram), rare radioactive isotopes like Californium-252 ($25.6M/gram), precious gemstones (rubies, emeralds), and high-purity elements like Rhenium and Platinum-group metals, alongside unique items like rare White Truffles, all valued for extreme rarity, difficulty in production, or unique scientific/industrial properties.