the circular onxy panels centred by a diamond cluster ground, of larger round brilliant cut diamond collet to middle bordered by a geometric design pierced and millegrain set with rose cut diamonds, mounted in platinum, fittings with various indistinct marks, the connectors marked SGDG BREVETE Diameter 1.3cm / �'' Weight: 12.5g
Late 18th / early 19th century pear shaped emerald and diamond cluster ring, c.1800, the Colombian emerald of step cut and elongated outline, open set and inverted within a heart shaped border of old cut diamonds,