Named after the former BGS sample store at Gorst Road, London, this archival collection of c.600 rocks is made up of a series of sub-collections donated by past senior members of the Geological Survey of Great Britain. The donators include several past Directors and other important figures in the history of the GSGB, including Sir Henry De la Beche, Sir Roderick Impey Murchison, Sir Archibald Geikie, Sir J.J.H.Teall, A. Greenly, A.C. MacGregor and many others. Many of the specimens have original labels attached to them. However, only scant details of tray contents are recorded in a local (PC-based) database, and there is no other register of the contents.