Slate is formed of compressed layers of sediments formed under ocean. Since it is formed in layers, it can easily be split to expose beautifully textured surfaces.
Slate can be earthy browns, beiges, yellows, black, dark-greys, and greenish-grey, pinks, purples and copper are also found. Slate is used a lot for flooring.
Sandstone is formed from sediments of small grains, usually quartz. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow, red, grey and pink, white.