Antique 18k (750°/°°) yellow gold ring set with a Roman intaglio on 3-layer agate probably depicting the goddess Athena in profile. French or Italian work from the 19th century for the setting and probably Rome, 1st or 2nd century, for the intaglio.
Dimensions of the intaglio: 6mm x 4.15mm
Finger size: 44
Weight: 3.7 grams