Finally we are going to get to the glass grinder. Its a great tool. There's a flat grid surface with a water basin beneath. The grids allow crud from grinding to fall into the water pool. There's a motor in the base that turns a diamond coated grinder head/bit which smooths down the uneven surfaces of our mishapen glass pieces to allow them to fit tightly. A sponge sits behind the grinder head and wicks water up to the surface to cool the glass and provides lubrication to insure a smooth finish.
So, I always start in the center and work outwards. Each glass piece surface is grinded smooth to follow the paper pattern that's been glued to it. Then, I'll soak the glass piece in water to release the paper, dry it off and see how it fits onto the working design.
Now that we have the body of the piece done we'll go ahead and cut the border.
Shown: glass grinder, fitting the glass pieces onto the original