The pictures don't really show just how much green iridescence she has! I know my cockerel is a hybrid of a few breeds, but she seems to be less varied.....
Where did she come from? Since you say the cockerel is mixed, I'm guessing she's not from a hatchery and is likely mixed herself?
The rose comb does point to Wyandotte ancestry, they are the most common rose combed breed running around. She could easily be a mix something like a Wyandotte and and Australorp, as black is a strongly dominant color.