Step 2: Gather Materials
Choose your tile and backing material. Your tile can be any tile you like, whatever size that you like. . . . but . . .you'll have to plan well before building your tile panels. Your backing material will be either plywood or a concrete board and you'll have to consider where you are making this panel, how heavy it will be, and how far it will have to travel before it's mounted. Choose the sturdiest backing for your project.
Don't ever be mundane. You could get really nuts and use a welded wire mesh to make curved and humped designs for a chandelier or decorative wall hanging. Glue the tile to the mesh with adhesive and then once, dry apply a mortar or grout to the back to really grab and hold the tile.
I used 1x1 tumbled slate.
My backing is 1/4" plywood subflooring.
The adhesive I used was a water resistant construction adhesive. When in doubt use water resistant. You can also use thinset mortar on drywall and wood, but I usually stick to construction adhesive for these and leave thinset for concrete and concrete board.
You'll need something to spread the glue/thinset around. Here I used a small notched trowel.