DC Universe Wiki

Kryptonite is a radioactive mineral from the planet Krypton, which emits a unique form of radiation that is toxic to Kryptonians.

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  • In the comics, Kryptonite is a rock that was once a piece of Krypton, which became irradiated when the planet exploded. The explosion scattered countless pieces across the galaxy, with many arriving on Earth the same time Superman arrived.

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