Forms of Kryptonite

While Green Kryptonite is the most common form, Kryptonite has been discovered in various forms, generally differing in both appearance and effect. The various forms of Kryptonite are:

Black Kryptonite - In comics it is capable of making Superman a darker, evil being. But it first made an appearance in Smallville (the television series) where it is actually superheated Green Kryptonite that splits psyches of anyone into two physical manifestations: the normal mind and the darker, evil personality. This Kryptonite is different in the fact that it could effect both Kryptonians and humans (Clark and Lex).

Blue Kryptonite - It is "Green Kryptonite" to Bizarro and in some cartoons and video games it heals Superman. In Smallville it appears in Episode 8 of Season 7 titled "Blue" and it it makes Kal-El powerless as long as it is in contact with his skin, but on Krypton it is considered an honor to receive it as a ring on one's finger. It's effects are reversed on Clark's "Bizarro" twin, super charging him until he explodes (Season 7, Episode 10).

Green Kryptonite - By far the most common variation. Green Kryptonite can weaken those of Kryptonian decent (weakening powers and abilities as well as strength), and in large enough doses or for long enough time it is lethal. In Smallville Green Kryptonite grants normal humans or other life mutations that make them super-powered and on most occasions psychotic. Here it also weakens Clark, at varying degrees including simply making him a little more human or leaving him on the brink of death.

Gold Kryptonite - It removes the abilties of Kryptonian permanently, though for a time there was an antidote that granted powers back for a short time.

Jewel Kryptonite - It comes from the Jewel Mountain range of Krypton. It magnifies the Phantom Zone resident's psychic powers, allowing them to project illusions into the "real-world" or to control the minds of non-Phantom Zone's denizens.

Orange Kryptonite - Gives normal cats Isis and Snooky super powers in Krypto the Super Dog #4.

Red Kryptonite - Affects Superman different every time for up to 3 days, as no piece of Red Kryptonite has the same effect but it can cause the oddest variety of effects including such things as transformations or even being unable to see anything green. In Smallville, Red Kryptonite removes Clark's inhibitions and cause him to act on all his impulses.

Silver Kryptonite - Is harmless made for Superman's "Silver Anniversary". Yet in Smallville it makes Superman paranoid when in his bloodstream, though in reality it was actually a hoax Kryptonite that was part of the BRAIN InterActive Construct.

Silver has made it's return found encased in the Ach-Om Rashay, the Amulet of Mindfulness. Superman was drawn to it and purposely exposed himself to it. It made him "HIGHly unstable" as Batman put it. Superman immediately craved brownies and cereal. He viewed the others as if they were cartoons. The only cure was to seek out the other half which countered the effects. It is unknown how much was due to the Kryptonite or how much was due to a magical spell.

White Kryptonite - Destroy's all plant life whether it is native to Krypton or not, created when Kryptonite passed through a weird space cloud.

X-Kryptonite - Gives non-powered lifeforms superpowers for a temporary duration. This is what gave Streaky the Supercat his powers, it was created by Supergirl who was seeking an antidote for Green Kryptonite.

Anti-Kryptonite - This peculiar form of Kryptonite exists in an alternate reality, where Ultraman (that reality's Supes) uses it as a power source. In fact, he gets weaker the farther away he is from it! But Pre-Crisis it is lethal to non-superpowered Kryptonians and killed many of them, it is their "Green Kryptonite".

Slow Kryptonite - This Kryptonite was created by Metallo and it is the "Green Kryptonite" to normal humans, but its effect on actual Kryptonians is unknown.

Magno-Kryptonite - It was artificially created by Nero and it pulls in anything native to Krypton so that not even Bizarro or Superman can escape its pull.

Bizarro Red Kryptonite - It is the "Red Kryptonite" to normal humans.

Kryponite-X - A pure, filtered form of Kryptonite, it powers up Superman to such levels that he becomes overmuscled from too much solar energy absorption.

There have also been hoax kryptonites such as Silver Kryponite in Smallville (mentioned above), Yellow Kryptonite, Blood Kryptonite, Kryptonite Plus, Purple Spotted Kryptonite and Fake Kryptonite.

Lex Luthor's former ring of power.

The Kryptonite Ring

Batman keeps a kryptonite ring inside a lead-lined compartment in his utility belt so that if Superman ever went rogue he would have a chance of controlling him. Lex Luthor once wore a krytonite ring to protect himself from Superman. Prolonged exposure to him caused him to lose his hand.

In Smallville, most meteor rocks are shown for the first time or used in the form of rings, usually it is because people think of them as being beautiful rocks, however usually this causes harm to Clark who is unsuspecting of the rings.