Ok, now can anyone tell me the black things in Crystal's hair are? Are they hair or a head piec

Crystal from the Fastastic Four, Avengers, and Inhumans to be specific.

Ok, now can anyone tell me the black things in Crystal's hair are? Are they hair or a head piece?

I always thought it was some kind of funky headband.

Ok, now can anyone tell me the black things in Crystal's hair are? Are they hair or a head piece?

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