Kryptonite is a fictional material that appears primarily in Superman stories published by DC Comics. In its best-known form, it is a green, crystalline material originating from Superman's …

Kryptonite is the name given to shards of matter that were cast off from the planet Krypton after its destruction.

Jul 18, 2025 · This article explores what kryptonite is, its various forms, and the origin of this fictional mineral within the world of comics. In the DC Comics universe, kryptonite is a mineral …

Mar 10, 2025 · While most Superman fans know Kryptonite as the glowing green rock that weakens the Man of Steel, DC Comics has introduced a remarkable rainbow of variants …

KRYPTONITE definition: 1. in stories and films, a fictional (= invented) substance that can hurt the character Superman…. Learn more.

Kryptonite was reintroduced in Superman #1 (January 1987) by John Byrne. After locating the Kryptonian birthing matrix, Professor Emmet Vale discovers a glowing green meteorite.

Jul 16, 2025 · Superman’s greatest weakness, Kryptonite, first appeared 82 years ago in The Adventures of Superman radio serial before making its comic book debut in Superman #61 …

Kryptonite is a fictional element in the DC Comics universe, and one of the few items that can harm Superman, his cousin Supergirl, and his dog Krypto. It is depicted as a radioactive …

Aug 18, 2025 · In the series, the Man of Steel discovers some never-before-seen variants of Kryptonite: purple, cobalt, speckled and rainbow. He’s determined to figure out how these new …

Sometime after Superman's debut in Metropolis, Lex Luthor began studying Superman to the point that he discovered the existence of Kryptonite, a radioactive mineral from the planet …