TIFFANY & CO., A SET OF THREE SEAGULL BROOCHES in 18ct yellow gold, each designed as a stylised seagull, signed Tiffany & Co, stamped 18K, 5.5cm, 4.5cm, 3.0cm, total weight 14.6g. Accompanied by a Tiffany & Co. box. 

Estimate £1,500 - £2,500

AN ANTIQUE DIAMOND SNOWFLAKE BROOCH / PENDANT later rhodium plated, set to the centre with an old cut diamond of approximately 0.50 carats, the openwork body accented throughout with old and rose cut diamonds, the diamonds all totalling 2.8-3.0 carat

Estimate £2,000 - £3,000

AN ANTIQUE RUBY SNAKE BROOCH in 18ct yellow gold, designed as a coiled snake, the head set with an oval cut ruby, no assay marks, 5.5cm, 9.4g. 

Estimate £1,200 - £1,600

AN ANTIQUE DIAMOND, EMERALD AND RUBY GIARDINETTO BROOCH, LATE 18TH CENTURY in silver and yellow gold, designed as a basket of flowers, set throughout with rose cut diamonds and accented by round cut emeralds and rubies, no assay marks, 3.0cm, 5.4g. 

Estimate £800 - £1,200

AN ANTIQUE ART DECO DIAMOND AND EMERALD BROOCH in platinum and yellow gold, designed as a triangle set with square step cut emeralds and rose cut diamonds, accented by an old cut diamond, no assay marks, 3.6cm, 3.4g. 

Estimate £300 - £500

AN ANTIQUE EDWARDIAN SAPPHIRE AND DIAMOND PENDANT / BROOCH in platinum, set with a pear cut sapphire of 3.80 carats, in a stylised scrolled body suspending a double old cut diamond drop, the diamonds all totalling 1.2-1.4 carats, maker's mark MC, ser

Estimate £2,500 - £3,500

A SAPPHIRE AND DIAMOND BAR BROOCH in platinum, set to the centre with a round cut sapphire of approximately 0.75 carats in a geometric openwork brooch set with round brilliant cut diamonds and calibre cut sapphires, no assay marks, 6.4cm, 7.8g. 

Estimate £1,000 - £1,500

AN ANTIQUE DIAMOND STAR BROOCH / PENDANT in yellow gold and silver, designed as a twelve rayed star set throughout with old and rose cut diamonds, the diamonds all totalling 1.2-1.4 carats, no assay marks, 3.5cm, 5.4g. 

Estimate £1,000 - £1,500

A TURQUOISE AND DIAMOND BROOCH / PENDANT in 18ct white gold, designed as a bow set with round brilliant cut diamonds, suspending a cluster of carved turquoise and diamond flowers, Austrian assay marks, 5.0cm, 18.1g. 

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND, PEARL AND ENAMEL BOW BROOCH / PENDANT in yellow gold, designed as a bow decorated with black enamel, accented by old cut diamonds and two pearl drops, no assay marks, 3.5cm, 5.9g. 

Estimate £600 - £800

AN ANTIQUE DIAMOND AND IMPERIAL TOPAZ BOW BROOCH in yellow gold and silver, designed as a bow set throughout with old and rose cut diamonds, suspending a pear cut imperial topaz drop of approximately 7.50 carats, no assay marks, 3.8cm, 6.3g. 

Estimate £4,000 - £6,000

AN ANTIQUE TURQUOISE AND DIAMOND BROOCH in yellow gold and silver, the lozenge shaped brooch set to the centre with a cabochon turquoise in a cluster of rose cut diamonds, the openwork frame set with old cut diamonds, the diamonds all totalling 2.3-2

Estimate £2,500 - £3,500

AN ENAMEL AND DIAMOND BROOCH in 18ct yellow gold, the foliate body decorated with turquoise and dark blue enamel, accented by round brilliant cut diamonds, stamped 750, 4.0cm, 14.8g. 

Estimate £600 - £800

A YELLOW SAPPHIRE AND DIAMOND BROOCH in white gold, set with an oval cut yellow sapphire of approximately 6.89 carats, in a border of old European cut diamonds all totalling 2.0-2.3 carats, no assay marks, 2.6cm, 5.3g. 

Estimate £5,000 - £7,000

AN ANTIQUE DIAMOND STAR BROOCH designed as a six rayed star, set throughout with old cut and rose cut diamonds, the diamonds all totalling 2.0-2.5 carats, no assay marks, 4.3cm, 11.6g. 

Estimate £1,000 - £1,500

AN ANTIQUE PEARL AND DIAMOND CLOVER BROOCH in yellow gold and silver, designed as a clover set with three pearls, accented by old cut diamonds, no assay marks, 2.5cm, 3.5g. 

Estimate £800 - £1,200

A VINTAGE RUBY AND DIAMOND FLOWER BROOCH in 18ct yellow gold, designed as an articulated flower, set to the centre with a round brilliant cut diamond and round cut ruby stamens, stamped 750, 5.5cm, 23.3g. 

Estimate £2,000 - £3,000

AN AQUAMARINE AND DIAMOND FLOWER BROOCH in platinum, set with a round cut aquamarine of approximately 1.30 carats, set throughout with round cut diamonds totalling 3.8-4.0 carats, accented by further round cut aquamarines, stamped PLAT, 5.4cm, 28.5g.

Estimate £2,000 - £3,000

AN ANTIQUE FRENCH ONYX AND DIAMOND JABOT PIN in 18ct yellow gold, set with a cabochon cut onyx in a border of rose cut diamonds, terminating in a further row of rose cut diamonds and a polished onyx cabochon, French assay marks, 9.0cm, 5.0g. 

Estimate £1,500 - £2,500

AN OPAL AND PEARL CLUSTER BROOCH in 15ct yellow gold, set with an oval cabochon opal in a cluster of pearls, stamped 15CT, 2.5cm, 4.5g. 

Estimate £600 - £800

AN ANTIQUE CITRINE AND PEARL BROOCH in yellow gold, set with an oval cut citrine of approximately 30.50 carats, in a border of pearls, no assay marks, 3.7cm, 20.9g.

Estimate £400 - £600

AN ANTIQUE TURQUOISE, DIAMOND AND PEARL BROOCH / PENDANT in yellow gold and silver, the scrolling body set with old cut diamonds and a pearl, suspending three pear shaped cabochon turquoise drops, no assay marks, 4.5cm, 6.2g. 

Estimate £1,000 - £1,500

A PAIR OF EMERALD AND DIAMOND CLIP BROOCHES in yellow gold, each set with a cluster of oval cabochon emeralds, accented by old and single cut diamonds, no assay marks, 2.9cm, 22.5g. 

Estimate £5,000 - £7,000

AN OPAL AND DIAMOND BUTTERFLY BROOCH / PENDANT in 18ct yellow gold, designed as a butterfly, the wings set with opal slices, the body accented by single cut diamonds, LB maker's mark, stamped 750, 4.1cm, 9.3g. 

Estimate £1,000 - £1,500

AN ANTIQUE SAPPHIRE, PEARL AND DIAMOND BAR BROOCH in yellow gold, designed as a row of old cut diamonds, terminating at each end with a hoop set with a round cabochon sapphire and a pearl, no assay marks, 4.0cm, 5.2g. 

Estimate £400 - £600

AN ANTIQUE GARNET AND DIAMOND BROOCH in yellow gold and silver, designed as a stylised flower set with five pear cut garnets accented by old cut diamonds, no assay marks, 2.7cm, 7.0g. 

Estimate £1,000 - £1,500

AN ANTIQUE DIAMOND EN TREMBLANT FLORAL BROOCH, 19TH CENTURY in 18ct yellow gold and silver, designed as a floral spray, the central flower set en tremblant, set throughout with old and rose cut diamonds, the diamonds all totalling 16.0-18.0 carats, n

Estimate £5,000 - £7,000

AN ANTIQUE BELLE EPOQUE DIAMOND AND PEARL BROOCH in platinum and yellow gold, the oval openwork brooch in foliate design set with a pearl of 6.7mm and old and rose cut diamonds, no assay marks, 4.7cm, 10.6g. 

Estimate £3,000 - £5,000

AN ANTIQUE PEARL AND DIAMOND BROOCH / PENDANT in yellow gold and silver, set with a pearl of 6.0mm in an openwork foliate style border set with old and rose cut diamonds and further pearls, no assay marks, 3.3cm, 9.5g. 

Estimate £1,800 - £2,200

AN ANTIQUE FRENCH BIRD BROOCH in 18ct rose gold and silver, designed as a bird perched on a branch, the body of the bird set throughout with rose cut diamonds, the eye set with a cabochon cut garnet, French assay mark, 4.1cm, 6.6g. 

Estimate £2,000 - £3,000

AN ANTIQUE ENAMEL AND DIAMOND PHEASANT BROOCH in yellow gold and silver, the head relieved in red, green and blue enamel, the body set throughout with rose cut diamonds, no assay marks, 4.0cm, 3.3g. 

Estimate £600 - £800

AN ANTIQUE PERIDOT AND PEARL SPIDER BAR BROOCH in 9ct yellow gold, the spider set with an oval cut peridot of approximately 1.61 carats and a pearl of 4.6mm, stamped 9, 7.6cm, 7.5g.

Estimate £300 - £500

A PAIR OF ANTIQUE EMERALD AND DIAMOND BROOCHES, 18TH CENTURY in yellow gold and silver, each designed as a scrolling flower, set with cushion and calibre cut emeralds, accented by old and rose cut diamonds, no assay marks, 2.8cm each, total weight 18

Estimate £1,500 - £2,500

A LARGE ANTIQUE CAT'S EYE CHRYSOBERYL AND DIAMOND BROOCH in yellow gold, set with a large oval cabochon cat's eye chrysoberyl of approximately 85.0 carats, within a border of old cut diamonds, the diamonds all totalling 2.0-2.4 carats, no assay marks

Estimate £2,000 - £3,000

A PASTE FLY BROOCH in yellow gold and silver, designed as a fly set with colourless paste and green paste stones, indistinct assay marks, 2.9cm, 10.8g. 

Estimate £400 - £600

AN ANTIQUE DIAMOND LEAF BROOCH in 18ct yellow gold and silver, designed as a leaf set throughout with old and single cut diamonds, the diamonds all totalling 5.0-5.5 carats, no assay marks, 5.4cm, 16.7g. 

Estimate £3,000 - £5,000

AN ANTIQUE DIAMOND ROYAL PRESENTATION BROOCH in yellow gold and silver, designed as the cypher M surmounted by a crown, set throughout with rose cut diamonds, marked indistinctly, 2.8cm, 4.5g. 

Estimate £800 - £1,200

AN ANTIQUE DIAMOND EN TREMBLANT BROOCH in yellow gold and silver, designed as a bouquet of flowers and set throughout with rose cut diamonds, the flower set en tremblant, no assay marks, 6.4cm, 13.9g. 

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND JABOT PIN in yellow gold and platinum, the openwork head and arrow set with rose cut diamonds, no assay marks, 6.5cm, 6.5g. 

Estimate £1,000 - £1,500

A GEMSET PARROT BROOCH in yellow gold, designed as a parrot perching on a pearl, the body set throughout with rose cut diamonds, the wings and tail set with sapphires, rubies, and emeralds, no assay marks, 5.1cm, 6.0g. 

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND, RUBY AND SAPPHIRE SPRAY BROOCH set with a round cut sapphire of approximately 0.89 carats, two round cut rubies and set throughout with rose cut diamonds, later rhodium plated, no assay marks, 6.1cm, 8.0g.

Estimate £400 - £600

A DIAMOND CIRCLE BROOCH in white gold, the openwork wreath set with old European and rose cut diamonds, no assay marks, 2.4cm, 4.0g. 

Estimate £600 - £800

A VINTAGE PERIDOT, EMERALD AND DIAMOND BROOCH the square openwork brooch set with a octagonal step cut peridot of approximately 10.64 carats accented by single cut diamonds, in a frame of square step cut emeralds and old European cut diamonds, no ass

Estimate £2,000 - £3,000

AN EMERALD, DIAMOND, AND PEARL BAR BROOCH in 18ct white gold, set to the centre with a cabochon cut emerald flanked by two rows of alternating rose cut diamonds and emeralds, terminating in two pearls, no assay marks, 8.1cm, 7.6g. 

Estimate £600 - £800

AN ANTIQUE DIAMOND FLOWER BROOCH in yellow gold and silver, designed as a spray of flowers set throughout with rose cut diamonds, no assay marks, 4.3cm, 11.6g. 

Estimate £500 - £700

A DIAMOND AND EMERALD BAR BROOCH in platinum, set with a row of old cut diamonds accented by calibre cut emeralds, no assay marks, 6.6cm, 8.6g. 

Estimate £1,200 - £1,800

A DIAMOND BAR BROOCH in yellow gold and platinum, set with old mine cut diamonds and rose cut diamonds, no assay marks, 6.4cm, 4.7g.

Estimate £600 - £800

AN ANTIQUE SAPPHIRE AND DIAMOND BROOCH in yellow gold, set with a cushion cut sapphire in a border of rose cut diamonds, no assay marks, 4.9cm, 5.5g. 

Estimate £300 - £500