Vermeule: Banded glass paste intaglio gem. Green, blue and white agate. (Modern gilt ring setting) Omphale walking left, with attributes of Herakles. Graeco-Roman.
[Book] Berges, Dietrich K. 2002. Antike Siegel und Glasgemmen der Sammlung Maxwell Sommerville: im University of Pennsylvania Museum of Archaeology and Anthropology.. Mainz am Rhein. Verlag Philipp von Zabern. pg. 78 Actual Citation : Page/Fig./Plate: p. 62, no. 316, taf. IV; taf. 58
[Catalogue, Exhibition] Turfa, Jean M., and Romano, Irene B., and Brownlee, Ann B., and White, Donald J. 2002. Guide to the Etruscan and Roman Worlds at the University of Pennsylvania Museum of Archaeology and Anthropology.. Philadelphia. University of Pennsylvania Museum of Archaeology and Anthropology. Actual Citation : Page/Fig./Plate: p. 79, no. 118
[Book] Vermeule, Cornelius C. 1956. The Sommerville Gem Collection of the University Museum of Archaeology and Anthropology.. The University Museum. Actual Citation : Page/Fig./Plate: no. 178
