Tritium - $30,000 / Gram

Tritium is a radioactive Hydrogen isotope. Tritium is mostly used in destructive war weapons such as nuclear missiles. Tritium is industrially made. It is very rare to find natural tritium on earth. Tritium is one of the most expensive materials on earth. A gram of tritium costs about $30,000. Four hundred grams of tritium is produced commercially every year.

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