So far:

Kitchen is done out with 4" natural stone tiles. Tiles are sealed.
I've avoided grouting them for too long as they cost a lot and took me ages
and I'm scared of messing them up!
The tile surface is pitted which is part of the look.

When I grout, ( 'ivory') should I do it in the conventional swishing across
the lot and filling the holes or somehow point up the joints?
What do others do?

Thank you

mark b