Breed of black cockeral and pullet with iridescent feathers

[Matildas Mum]

https://www.cacklehatchery.com/12-black-chicken-breeds/
This might help with the one that's all black.

Thank you!

 

[Matildas Mum]

Is there any possiblility of the black ones being an australorp mix? I didn't think they could be australorps because of the brown feathers, but the one in the picture on this website appears to have brown feathers. I have a better chance of finding a home for him if he is. https://www.rarebreeds.co.nz/australorp.html