Bargate stone is a highly durable form of sandstone. It owes its yellow, butter or honey colouring to a high iron content.[1] In some contexts it may be considered to be a form of ironstone[citation needed]. However, in the context of stone buildings local to the extraction of Bargate Stone, the term 'ironstone' is often used to refer to a darker stone, also extracted from the Greensand, which rusts to a brown colour.[2]
- ^ "Bargate Stone in the Guildford Area". Guildford Society. 23 October 2017.
- ^ "Repair and maintenance of stone buildings" (PDF). Spelthorne Borough Council.