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 home world of …

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

The meaning of KRYPTONITE is a substance that causes the comic-book character Superman to become weak when he is exposed to it—often used to describe something likened to kryptonite in …

Oct 23, 2025 · What exactly is Kryptonite? Guys, if you're a fan of Superman, you know this green, glowing rock is his ultimate achilles' heel. It's the stuff of legends, the bane of the Man of Steel's …

Jun 3, 2015 · Radioactive fragments of Superman’s home planet, Krypton, Kryptonite is the go-to choice for anyone wanting to take him down.

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 throughout eight decades …

Jul 18, 2025 · Kryptonite is a fictional mineral from Superman’s home planet, Krypton. When Krypton exploded, radioactive fragments of the planet were scattered across space. These remnants, …

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 variants affect …

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.

Aug 19, 2025 · Black Kryptonite presents a unique and complex form of Kryptonite, first appearing in the Supergirl television series in 1989. Its primary effect is the ability to split a Kryptonian into two …