Like amy, we just let our glass mosaic tile "end" in the previous house's kitchen backsplash and the current house's master bath wall tile. The edge is caulked, but is slightly rough when you run your finder over it. I have a long horizontal edge behind the vanity sinks (about 7" above the sinks) and I have not found it difficult to keep clean or anything. I like the simpleness of just letting the glass tile end. In our installations, any edging would have been too fussy...

Thanks everyone! I'm usually a believer of "you get what you pay for" so that's why I'm a little worried about buying the cheap tile. However, it's the perfect color - I can't find another one that coordinates as well as the cheap one! It's either the cheap ceramic subway or white dolomite marble in 2" x 6". We'll have dark, distressed wood floors, white cabs with vintage finish, raven caesarstone on the perimeter and cambria torquay on the island. Our family room and kitchen are one big, long rectangle so they need to coordinate. Our family room has mostly cool colors - blue, gray, white and espresso. Any thoughts??

Yes, it can all be done. It just matters how much you want to spend. You can even cut a hole right in the middle of a tile, but would cost a lot of time to have someone do it. And there's a great chance for accidental breakage which increases the time involved. You do it the way you would with wood, by drilling, then carefully filing and nipping out the area, then grinding and sanding to make clean edges. It would be better to just cut the tile in two L shapes, over the inset, but a hole can be made. I have a lot of tile in my kitchen which is randomly set without grid. The big problem with cutting tiles occurs if they're cut out (in the making) before firing. Then they have rounded edges, which are very nice, but which go away when they're cut. That makes the cut show a lot more. There are also "rectified" tiles, which are cut after firing, which have perfectly straight sides. You can cut those any which way and have the edges match. The main thing for doing things that the person in the tile shop thinks can't be done is to have a master tile setter. A lot of people think they know how to install tile, who can do a perfectly acceptable job of putting a grid on a floor, who cannot cut difficult shapes. My tile setter can freehand a circle on a tile saw. It's not perfect (being that only straight cuts can be made), but it's pretty darned impressive. He does complex, double L cuts with aplomb. Oh. I should say that the quality of the tile matters too. The actual clay used can have an effect on how well it cuts, and some glazes are more prone to cracking when cut than others.

If not, you can always take pieces to a stone shop and have them bullnose them for you.