Could this be asbestos?

[hebrys]

The grey colour in between?

I don't know, but you need to get it checked out. Do you own the property or is it rented?

It could be. Whereabouts in the house is it? In the 1950/60s it was used as wall lining, but has been banned since the 1980s.
Do not poke anything into it or damage it in any way. Get an expert in to test it.
It can be removed, but is very costly.