cockatiel mutation

[cockatielgirl]

hi i just want to know how many mutation of cockatiels there are and see all of them also if you have any info or photos please post them!
these are my cockatiels

molly- white face and dark gray pastel face crosshttp://http://www.parrotforums.com/...ckatiels-picture8666-molly-washing-hanger.jpg
and
tinker bell- pearl http://http://www.parrotforums.com/...-cabinet-tinkers-bird-messed-up-crest-lol.jpg