EN 12326, British Standard: BS 680 Part 2 Cupa Pizarras CUPA 14 is a non-carbonated slate formed by tectonic compression. Dark grey slate with thin laminations and a riven surface.

Although it's commonly known as a dark gray rock, slate can be found in green, purple, red, and other earthy shades, leaving you with options to give your home personality. But while slate tiles ...