A FINE ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and platinum, set with an octagonal cabocho...

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, 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 CLUSTER RING in 18ct yellow gold and platinum, set with a cabochon opal in a cluster of rose cut diamonds, stamped 18CT & PLATINUM, size M / 6.25, 2.7g. 

A FINE ANTIQUE DIAMOND AND ENAMEL BROOCH, 19TH CENTURY in yellow gold and silver, set to the centre with an old oval cut diamond of 2.14 carats within a scrolling border of black enamel, accented by a

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 AMETHYST AND DIAMOND BROOCH in yellow gold and silver, set with an octagonal step cut amethyst in a foliate border set with old cut diamonds, no assay marks, 3.1cm, 6.7g.

A FINE ANTIQUE AUSTRIAN ENAMEL, PEARL AND DIAMOND BROOCH in yellow gold, of rectangular design, set with two pearls and an applied foliate motif set with rose cut diamonds, accented by a border of whi

AN ANTIQUE OPAL AND DIAMOND RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with three cabochon opals, accented by round cut diamonds, stamped 18CT & PT, size L / 5.75, 2.7g.

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,

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

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 HARE BROOCH in platinum and yellow gold, set with old mine cut and rose cut diamonds, accented by a cabochon ruby eye and engraved fur detailing, no assay marks, 3.8cm, 5.8g. Accomp

AN ANTIQUE DIAMOND HARE BROOCH in platinum and yellow gold, set with old mine cut and rose cut diamonds, accented by a cabochon ruby eye and engraved fur detailing, no assay marks, 3.8cm, 5.8g.

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

A FINE ANTIQUE DIAMOND DRESS RING, EARLY 20TH CENTURY in yellow gold and platinum, the scrolling face set with old cut diamonds accented by rose cut diamonds, no assay marks, size J / 4.5, 3.6g.

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.

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

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

AN ANTIQUE DIAMOND AND ENAMEL BROOCH / CHOKER JEWEL, FRENCH MID 19TH CENTURY in high carat yellow gold, the octagonal face set with an old cut diamond within an enamelled scene depicting cherubs, unma

Antique Handmade Brooch-Pin in 14K yellow gold, Platinum Iridium, with "Eclipse-Crescent" design, set with (15) Old European cut round brilliant diamonds graduating from the center, approx. 0.45 ct to

A FINE ANTIQUE NATURAL PEARL AND DIAMOND HORSESHOE BROOCH, LATE 19TH CENTURY in yellow gold and silver, designed to depict a trio of horseshoes all jewelled with old cut diamonds, the central one set

Antique black opal cameo set atop onyx set in platinum and 18kt white gold with diamonds. Width 1 3/8;; total weight 7.5 grams Condition: Two tight fissures in onyx at 12 and 6, perhaps intentional

A large brooch consisting of approximately 95 prong set diamonds and 10 natural pearls set in 18k yellow gold and platinum. Superior workmanship, with the largest diamond measuring 2.75 mm in diameter

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