The youngest of the quartz-based stones, sandstone is a sedimentary stone that is the result of sand eroding and being re-deposited by either wind or water.

Sandstone rock comprises of sand sized grains of quartz, feldspar, organic matter and rock fragments lithified (cemented) together. The minerals that cement the grains include quartz, pyrite and calcite.

Donnybrook Sandstone is available in the immediate vicinity of Donnybrook in the South of Western Australia. The townsite is on the eastern edge of the coastal plain amongst the foothills of the Darling Scarp, some 200 feet above sea level. The country near Donnybrook consists essentially of a highly dissected plateau between 1,000 feet and 1,500 feet above sea level.

DONNYBROOK SANDSTONE, originating from the Jurassic period, is felspathic sandstone with a principal bonding of kaolin or halloysite. Its colour varies from pure white to deep buff or exceptionally deep pink, the paler coloured stone invariably darkening evenly on exposure to air. Its grain size varies from very fine to moderately coarse.

As sandstone heats and responds to pressure, it eventually turns into quartzite, which is a very hard and dense material.

"Excellent as a flooring material, sandstone is exceptionally cool underfoot."

Source

Wyatt, J. D. (ND). Report On the Sandstone Deposits of Donnybrook. In Geological Survey Of W.A. (pp. 16-20). Perth: Department Of Mines