African meer is extremely variable judging from pipes I have worked on. Some of it is yellow, some brown, some white, some all 3 in one block. I have tried sanding and restaining several and they never take stain well at all, always blotchy results and not much penetration. What amazes me is how well it absorbs moisture. You can hold the block under water, take it out and within a few seconds its absorbed all the moisture into the block and feels dry. Why it doesnt take the stain in is a mystery to me.
So the pipe may or may not color. I would expect it to have some subtle changes with a lot of use, but that will depend on the block I suppose.
Like others mentioned, it is tough stuff. Very much like a rock, where Turkish is more like hardened clay.