An Art Deco diamond pendant and decorative chain. The pendant is set with an approximately 1.65ct old-cut diamond, in a millegrain edged rub over setting, with an approximately 0.42ct old-cut diamond above, in an articulating, open-work, millegrain edged mount, grain set with old-cut diamonds. The chain features bar links, intersected with twisted wire work ovals, alternating with trace links, interspersed with round brilliant-cut diamonds, in grain set surrounds, mounted in platinum. With a total diamond weight of approximately 4.35ct. Circa 1925.