Roman Amethyst Gemstone with Head of Alexandria. 1st century A.D. Fragment of a ferrous hoop and bezel inset amethyst cabochon with intaglio profile bust of a female wearing the nemes crown, the personification of Alexandria. 3.67 grams, 21 mm (7/8 in.). [No Reserve] From the Fadel family collection, London, UK, 1970s.