yeah, You should be looking to make the honing face on one layer. If the stone has tight layers this is very hard, Likewise if the stone is just a layer-less block it's unimportant. When you have layers that you can easily pick between, and you can cut so you can only see 1 layer then you should try to do this. It'll help reduce the chance that the inclusions in the stone will appear on the honing face. And it looks better and you get an even surface in terms of hardness/grit.