The domed oval sardonyx is composed of two layers, red over cream. Engraved with the charming scene of the infant Dionysos riding a pantheress, sitting astride her back holding a long ribboned thrysos and offering her a cup. She sits with one forepaw raised, long tail curling up, her head turned back towards the god, with her tongue out to drink from the proffered vessel. The image of the infant god riding a panther was obviously popular in many media: see "Dionysos/Bacchus", in LIMC, Vol III, p. 552, no. 148, for a fresco in Naples Museum, inv. no. 9122 and p. 554, no 174 for a mosaic with the infant being supported by a maenad. For a very similar gem in Berlin (inv. no. 1680), cf. A. Furtwängler, Die Antiken Gemmen, Berlin and Leipzig, 1900, pl. XXVIII, no. 23.