Marble are yet another product procured through mining and used for building interiors and exteriors. It is extremely beautiful and more cost effective then most other wall and floor coverings. It gives a very graceful, natural finish to any building or home. The usual colors of slate are black, dark gray, greenish gray and purplish gray. Sometimes color changes do occur due to weathering. Marble stone or simply slate is compact metamorphic rock, composed primarily of silica and alumina. Slate is easy to clean, requires very little maintenance and also provides high slip resistance & is long lasting.