Sandstone is a warm and singularly unique material. Its popularity has
increased in the last few years as it has become more readily available
in a variety of products. Sandstone is a unique natural stone, initially
formed by sand cemented together in the earth along with silica, iron,
or lime. The cementing material determines the color of sandstone.
Thus iron sandstones are reddish or brownish; carbon sandstones
are black; siliceous are white; and argillaceous are earthy to buff.

Sandstone