Centering an old cut diamond weighing app. 0.06ct., framed by four onyx measuring app. 4.0 x 2.5mm, calibre cut rubies* (0.05mm) and Rose cut diamonds (1.5mm), in an "X" design, fashioned in platinum & 18k. Circa 1910. Size 7.5*Stones are assumed to be simulants or synthetic as was typical in jewelry of this style/era.