AN ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and

AN ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and silver, set with a central cabochon opal within a scrolling openwork mount set with old cut diamonds, the diamonds all totalling 5.3-5.5 carats, n

AN ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and silver, formed of a trio of flower motifs, each set at the centre with a round cabochon opal, accented in the petals by rose cut diamonds, unmarke

AN ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and silver, set with a trio of graduated oval cabochon opals, accented by rose cut diamonds, no assay marks, 3.5cm, 2.6g.

AN ANTIQUE OPAL AND DIAMOND BROOCH, 19TH CENTURY in high carat yellow gold, designed as a crescent moon jewelled with graduated cabochon opals accented by old and rose cut diamonds, set to a plain bar

ANTIQUE OPAL, DIAMOND AND ENAMEL BROOCH, 19TH CENTURY in high carat yellow gold, in open heart design set with a moon cabochon opal, old and rose cut diamonds totalling approximately 10.00 carats and

NO RESERVE - AN ANTIQUE BLACK OPAL AND DIAMOND BAR BROOCH, CIRCA 1910, Made in yellow gold and platinum, Oval cabochon black opal, weighing approximately 1.61 carats, Single cut and rose cut diamonds,

10k white and yellow gold pin brooch, set with a central round shaped cabochon opal, approximate total weight of opal 1.57ct, flanked by four old European cut diamonds, approximate total weight of dia

Antique Victorian Opal, diamond, enamel, and gold brooch Set with cabochon opals and rose-cut diamonds, in a swirling surround of black enamel; 1880s Yellow gold 2.75 x 1.25 in; Gross weight 12.0 dwts

Antique Early 20th Century Yellow & White Gold, Diamond, & Opal Cameo Brooch. Circa 1900. A rare large hand carved opal cameo of Floral in a border of old mine cut diamonds. Approximately 1.65 carats.

NO RESERVE - AN ANTIQUE ART NOUVEAU DIAMOND AND OPAL BAR BROOCH in 15ct yellow gold, set with an old cut diamond and an opal cabochon within two scrolling bars, stamped 15, 4.0cm, 3.9g.

14K Yellow Gold Diamond Opal Brooch Pendant. Size 2" weight 17.8 grams

A Group of Six Brooches. Including 3 14 kt gold, opal, and pearl brooches, 1 14 kt yellow gold Victorian brooch with small diamond enhancement at the center, 1 brooch with three flowers all centered b

A FINE ANTIQUE DIAMOND BROOCH in yellow gold and silver, spelling GEORGE, each letter set with old cut diamonds all totalling 2.8-3.0 carats, no assay marks, 5.8cm, 7.8g.

AN ANTIQUE DIAMOND BROOCH / PENDANT in yellow gold and silver, the openwork body set throughout with old cut diamonds, the diamonds all totalling 4.2-4.6 carats, no assay marks, 4.4cm, 14.6g. 

AN ANTIQUE DIAMOND STAR BROOCH in yellow gold and silver, designed as a five rayed star, set throughout with old cut diamonds, the diamonds all totalling 2.8-3.2 carats, no assay marks, 3.4cm, 7.9g.

AN ANTIQUE DIAMOND SWEETHEART BROOCH in yellow gold and silver, designed as two interlocking witches hearts surmounted by a ribbon tied in a bow, jewelled with old cut and rose cut diamonds, no assay

AN OPAL AND DIAMOND BROOCH in yellow gold, set with a cabochon opal of approximately 13.61 carats, in a border of old cut diamonds totalling approximately 1.40 carats, unmarked, 2.5cm, 7.3g.

AN ANTIQUE DIAMOND BAR BROOCH in yellow gold and silver, set with a cluster of old cut diamonds on a tapering bar set with further old cut diamonds, the diamonds all totalling 0.4-0.5 carats, no assay

AN ANTIQUE DIAMOND LOCKET BROOCH in yellow gold, in Etruscan revival design set to the centre with an old cut diamond, with a glass covered locket panel to the reverse, no assay marks, 4.5cm, 10.8g.

AN ANTIQUE DIAMOND LOCKET BROOCH in yellow gold, set with an old cut diamond in an engraved star border, accented by beadwork, with a glass covered locket to the reverse, no assay marks, 5.3cm, 10.4g.

A FINE ANTIQUE DIAMOND STAR BROOCH / PENDANT in yellow gold and silver, designed as a seven rayed star, set with a central cluster of old cut diamonds, the central diamond weighing 1.89 carats, accent

AN ANTIQUE DIAMOND CRESCENT MOON BROOCH in yellow gold and silver, set with graduating old mine and rose cut diamonds all totalling 2.0-2.5 carats, no assay marks, 2.5cm, 4.4g.

AN ANTIQUE OPAL CRESCENT MOON BROOCH in yellow gold, designed as a crescent moon set with a row of graduated cabochon opals, no assay marks, 2.7cm, 3.1g. 

AN ANTIQUE VICTORIAN DIAMOND HUNTING BROOCH in yellow gold and silver, designed as a horn with an applied horseshoe and riding crop motif accented by old and rose cut diamonds, no assay marks, 3.5cm,