I use the Norton stones for honing (I'm just starting out), but I've never used a slurry stone.

Looking around on the web, I can see coticle slurry stones, Nagura slurry stones, and the Norton slurry stone.

Can you use a natural stone like a Nagura on a Norton (synthetic) one and vice versa?

And finally, you Norton fans: what slurry stone do you use?

Thanks,
Tim