Pair of platinum and 18K (750) white gold earrings, set with old-cut diamonds, each holding an enlarged platinum ring with a center adorned with rose-cut or 8/8-cut diamonds and calibrated onyx. Circa 1925. Height: approx. 3.5 cm. Gross weight: 8.4 g (missing; pierced ear system) A 1925 diamonds and onyx ear pendants