Impossible to tell from the pictures.
Household asbestos is usually a dirty white colour, very hard but very brittle and will break with a light knock. Looks a bit like a badly made cement sheet.
The white stuff is largely harmless. Your use of the words "wood coloured" have rang some alarm bells as the really deadly stuff is blue or brown.
If it isn't white, I would get someone who really knows what they are looking at to view it.
Meanwhile leave it alone and stay away from it.