Diamond Brooches A LATE 19TH CENTURY DIAMOND AND NATURAL PEARL BROOCH Of bow design, the five graduated loops pavé-set with circular-cut diamonds, to the principal diamond collet ‘knot’ centre, suspending a natural pearl drop with diamond-set cusp, circa 1890, Austrian marks for silver and gold, 6.8cm long, drop and brooch fitting detachable brooch A RUBY AND DIAMOND BOW BROOCH The looped ribbon set with a central line of calibré-cut rubies channel-set within a brilliant-cut diamond surround, to the diamond-set knot centre, Austro-Hungarian marks for gold, 5.6cm wide A diamond brooch

PLATINUM AND DIAMOND BROOCH, CIRCA 1925PLATINUM AND DIAMOND BROOCH, CIRCA 1925 PLATINUM AND DIAMOND BROOCH, CIRCA 1925 EMERALD AND DIAMOND BROOCH designed as a variously-cut diamond and emerald ribbon bow, signed Sabbadini