A Kryptonite meteor did show up in "Superman/Batman: Public Enemies". It was too dangerous to send anyone up to destroy it, except for Captain Atom, a Metahuman who used quantum energy and wore a containment suit. When he destroyed the meteor, it changed much of the Kryptonite into different colors, sent him to Earth-50 and free Kara Zor-El's ship which had impacted inside of it when Krypton blew. Her ship was lead-lined, which allowed her to survive. The Kryptonite fragments landed on Earth. Red Kryptonite causes unpredictable results, lasting about 48 hours. Nothing is ever repeated when exposed. A Kryptonian could lose control of their powers or become mutated in some form or fashion. In certain media, it allows for one to become evil or apathetic. Artifical Red Kryptonite created by Batman causes intense pain, as it overloads their solar cells, before they pass out. Black Kryptonite is a creation of Darkseid. It caused Supergirl to split in two, resulting in a good Supergirl and an evil, black suited Supergirl. It has not been used on Superman in the comics, nor has it been mentioned since "Supergirl: Power". Gold Kryptonite robs a Kryptonian of their powers permanantly. Thus far, it has yet to be used Post "Infinite Crisis", but it will most likely in Action Comics Annual #11, the conclusion of "Last Son". Metallo has it as one of his four main power cells, allowing him to rotate between the four main colors. Blue Kryptonite weakens and kills Bizarro and Bizarro duplicates. Lex used a piece to torture and gain control over Bizarro. He installed a piece in Metallo, most likely to keep Bizarro in line. It has no affects on Kryptonians. Jewel Kryptonite allows for a Phantom Zoner to have a telepathic link to the outside world. It has been mention since "Infinite Crisis", but not seen. It came from Krypton's Jewel Mountians.