Identify these please

[Missceegee]

I purchased some young birds at the local feed store. They thought they were mystic onyx. Others have said Ayam Cemani. Thoughts?

 

[talkinboutchickens]

I think mystic onyx's have crests.
It could be an ayam cemani, however, usually those are very expensive. It could be a black sumatra but your hen has a bigger body type than that of a black sumatra.