They are beautiful! Different shades of gray, white, and beige.  They are not all uniform in color and their are a couple here and there that are darker.  It is really nice when you feel them underneath your feet.  It will take some getting use to.  Depending on how you have them grouted, you can probably choose to have grout underneath and then a thin layer over them or a thicker layer of grout.  The thicker layer will show the tops of the stones and not as much around.  Will add pictures later!!