The granite floor of our shower was cut up into these tiles for two reasons. First, the floor slopes from the edges to the center for drainage, so a big, flat piece of granite wouldn't work. Second, granite would be too slippery for a floor without these grout lines. Mrs. Carpenter would rather slip and fall than stick on some safety appliqués. The granite is so beautiful, I agree with her.
The granite was cut up into these tiles and numbered to re-create the pattern in the large piece.
Rudy, our tile man set the granite tiles in sequence and he used these silicon spacers to make the grout lines even. I'll try to get a picture of Rudy tomorrow when he grouts this floor.