Ca. 1800 ADA carnelian intaglio of ovoid form, skillfully incised with a depiction of God Mars wearing his military attire, set in an elaborately ornamented gold brooch setting composed of a twisted inner border and an openwork design made of fine coils decorated with filigree, and six coral cabochons alternating with floral-shaped plaques topped with three granules. Pin and catch plate to the reverse. Mars is the god of war in Roman religion and mythology and his Greek counterpart is Ares. Though he is primarily known as the god of war, he is also known as a guardian of agriculture, the god of spring, fertility, virility, and growth in nature.Size: L:52mm / W:43mm ; 17.37gProvenance: Property of a London Art gallery; formerly acquired on the US Art market; previously in US collection I. G. formed before 1970.