Nox's wand is dark Koa wood, which I fell in love with when my dad was still working with wood. The wood itself looks like this:

That has a band of bird's eye maple. It's a nice, dark wood.
As for what it would look like... probably something along these lines:
WandOnly different wood, and thinner.
Stats:
Wood: Dark Koa
Length: 13 inches
Core: Phoenix feather
Rigid