Glass tile

Not only does it take a "special" equipment to install glass tile, but a special adhesive too! Or so is the word in the industry.
In order to cut glass tile without breaking it, a special saw blade is required, and even that has a tendency to chip the edges. But also, not ANY adhesive will work for the adherence as there is no porocity to glass to speak of so not any adhesive will stick.
Glass tiles are expensive in themselves, acquiring someone who knows how to install them correctly is also worth more!