Black Stone 20mm Outdoor Porcelain Tile 600x600mmLuxury Tile's Urban Black Stone Effect Outdoor Tile has taken inspiration from black natural stone that has become increasingly popular over the years; however, dark natural stone can leave a bitter taste in homeowners' mouths as it can fade over the seasons and sometimes over just a few months leaving a faded grey finish instead of the intended black, this can lead to time consuming reapplication of sealers or colour intensifiers to get the product