Simple, clean, just enough texture and color variation so as not to be clinical or boring.  Swirls.  Dots.  Inclusions.  Not white but not much color.  Actually, a similar stone is used in the bathroom floors of our condo.  Nice because, well, not white.  Not sterile or generic, yet not making a brash statement.  Not that brash statements might not have their place…perhaps this tells me why it is a good exercise to make art with very little color, at least once in a while.  Color can be deliciously distracting!