ONYX, EMERALD AND DIAMOND BROOCH, ca. 1925. Platinum, 10g. Open work, Art-Déco brooch in form of a bow-tie, centering upon 1 octagonal emerald of ca. 0.30 ct, flanked by 2 onyx elements, with diamond-carré borders totalling ca. 0.80 ct and decorated with 2 onyx elements and circular-cut diamonds totalling ca. 1.80 ct. L ca. 4,6 cm.

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