Thomas Webb & Sons was an English glass company, founded in 1837 by Thomas Webb (1804-1869) near Stourbridge, England. The name T. Webb & Co. was adopted in 1842, and later became Thomas Webb & Sons. Webb operated the Platts glasshouse from 1837 to 1856 and then the Dennis glassworks from 1855 to 1990. The finest and most valuable pieces were signed with "GEM CAMEO" included in the mark - Roman cameo glass was itself an imitation of the luxury art form of the cameo engraved gem.