Sandstone is very often called York Stone and vice versa. Although the popular, yellow York Stone is indeed sandstone, it is not the only type. Other colours such as reds, pinks, beiges, creams, blues and browns are also available. Whilst many of these are indigenous to the U.K., sandstone is found all over the world. Sandstone is a sedimentary rock formed over millions of years from fine grains of sand glued together by minerals of natural cement. It is the composition of this "cement" which determines the colour and hardness of each sandstone. Some of the harder sandstones are rich in quartz and feldspar, two minerals that are also commonly found in granite. Sandstone is used in situations where a colourful, durable, non-slip, low maintenance surface is required. Popular examples include flooring and wall cladding, landscape features like patios, terraces, balconies and paths and both internal and external swimming pool surrounds.