Kryptonite

Kryptonite is the term for radioactive pieces of Clark Kent's homeworld, Krypton. For those unaware of Clark's alien heritage, kryptonite is simply referred to as meteor rocks. Such rocks had accompanied Clark to Earth during the meteor shower that had struck Smallville in 1989, concealing his spaceship as it had landed in Miller's Field. Kryptonite radiation has had strange effects on the residents of Smallville, as well as the flora and fauna, mutating some of the plants and animals while giving humans special abilities, said humans being referred to as 'meteor freaks'.

Types of Kryptonite Green Kryptonite Most common form. Lethal to Kryptonians. Red Kryptonite Strips Kryptonians of their inhibitions. Clear Kryptonite Green kryptonite neutralized. Harmless to Kryptonians. Black Kryptonite Splits humans and Kryptonians into two personalities. Silver Kryptonite Made from Brainiac. Makes Kryptonians paranoid. Blue Kryptonite Strips Kryptonians of their powers temporarily. Gemstone Kryptonite Grants wishes for Kryptonians. Gold Kryptonite Strips Kryptonians of their powers permanently.