We had a nicely constructed, found, end-table with an aging surface, and I've wanted to do a broken tile mosaic for a long time. However, finding cheap or free (broken) tiles is nearly impossible. Called tile stores looking for broken or leftover pieces. Went to Menard's; broken tiles are cataloged as right-offs. Searched online and found prebroken tiles by the pound = $$$.
I was about to give up until there was a dominoes sale at Target. Who needs tiles? Dominoes are much more fun!
Step 1: Materials and Testing Layout
Luckily, when we tested the layout to see if we had enough dominoes and what patter we would need to use, it worked out perfectly. Except you will need one half domino for the center!
NOTE: One thing you might want to consider is that once you have your layout, you might want to construct a frame around the edges of the table. (We couldn't do this "easily" because we had a slight overhang to all sides.) In the end, we were a little off in one direction and the spaces between dominoes increased on that direction as we reached the center. The frame, perhaps nailed in place, will insure that your layout is tight-fitting.
+tube of construction adhesive (we used about half a tube): $3
+about 250 dominoes: $20
+time: 2-3 hrs