A story of the city’s past is hidden in its sidewalks. Scattered throughout the core of the city, squares of purple glass ...

That's not the only reason tempered glass shatters when it comes into contact with tile, however. There's another factor at play, and that's the supposed "smoothness" of tile.

SolTech’s Beautiful Glass Roof Tiles Heat Your Home With Solar Energy Environment Environment Renewable Energy Solar 01/20/2014 under Environment, Solar, Technology ...