Imagine the beauty of “the original Pierre bleue”……its history, its colour, its structural properties, then think of the possibilities combining the superior technology and design of Italy, then put it all together in a supremely practical tile of matchless strength. Bluestone Evolution adds 5 new colours to the Bluestone series, ranging from deep blues & blue blacks through to the dark grey ‘Rockstone Grip’ that was specifically designed for exterior paving.