Wikipedia description Yorkstone or York stone is a variety of sandstone, specifically from quarries in Yorkshire that have been worked since the middle ages.[1] Yorkstone is a tight grained, Carboniferous sedimentary rock. The stone consists of quartz, mica, feldspar, clay and iron oxides. The Brontës were a nineteenth-century literary family, born in the village of Thornton and later associated with the village of Haworth in the West Riding of Yorkshire, England. The sisters, Charlotte (1816–1855), Emily (1818–1848), and Anne (1820–1849), are well-known poets and novelists. email or Text 480-562-9139