A DIAMOND AND SYNTHETIC RUBY PLAQUE BROOCH set to the centre with an octagonal step cut synthetic ruby, accented by round brilliant and baguette cut diamonds, the diamonds all totalling 3.0-3.2 carats, no assay marks, 4.7cm, 9.9g. 

Estimate £400 - £600

VAN CLEEF AND ARPELS, A LARGE AND RARE TURQUOISE AND DIAMOND ROSE DE NOEL BROOCH in 18ct yellow gold, designed as a Christmas Rose set with a cluster of round brilliant cut diamonds and gold spines, the petals set with heart-shaped polished turquoise

Estimate £25,000 - £35,000

VAN CLEEF & ARPELS, A DIAMOND AND ENAMEL PANDA BROOCH in 18ct yellow gold, designed as a panda bear, pave set with round brilliant cut diamonds, highlights relieved in black enamel, signed VCA and numbered, French assay marks, stamped 750, 2.8cm, 17.

Estimate £2,000 - £3,000

NO RESERVE - AN ANTIQUE BANDED AGATE AND DIAMOND BROOCH in yellow gold, comprising a polished concave piece of banded agate set with an old cut diamond, no assay marks, 1.9cm, 2.7g. 

Estimate £100 - £150

A FINE ART DECO DIAMOND CIRCLE BROOCH, CIRCA 1935 designed as an open circle accented by a geometric bow to the centre, set throughout with transitional and baguette cut diamonds, the diamonds all totalling 6.0-6.5 carats, no assay marks, 3.7cm, 11.9

Estimate £2,500 - £3,500

A FINE ANTIQUE BLACK OPAL AND DIAMOND BROOCH / PENDANT in yellow gold and silver, set with an oval cabochon opal accented by clusters of old cut diamonds, no assay marks, 3.6cm, 6.0g. 

Estimate £2,000 - £3,000

AN ART DECO SAPPHIRE AND DIAMOND BROOCH the oval pierced brooch set throughout with rectangular step cut and calibre cut sapphires and old and single cut diamonds, the diamonds all totalling 1.3-1.5 carats, no assay marks, 4.9cm, 11.6g. 

Estimate £2,500 - £3,500

AN ART DECO ONYX, RUBY AND DIAMOND BROOCH in 18ct gold, comprising a polished onyx hoop, accented by rows of round cabochon rubies and single cut diamonds, stamped 18CT, 4.0cm, 22.1g.

Estimate £1,000 - £1,500

AN ANTIQUE SAPPHIRE AND DIAMOND CIRCLE BROOCH in yellow gold and silver, designed as an open circle set with round cut sapphires and rose cut diamonds, no assay marks, 2.6cm, 6.2g. 

Estimate £400 - £600

A RUBY AND DIAMOND BROOCH / PENDANT, 1940s in platinum, the scrolling brooch set with a cushion cut ruby in a border of pear cut diamonds, accented by round brilliant cut diamonds, the diamonds totalling 2.7-3.0 carats, stamped 10% IRID.PLAT, 3.7cm,

Estimate £2,000 - £3,000

GUBELIN, A VINTAGE DIAMOND SPRAY BROOCH in 18ct yellow gold, designed as a stylised foliate spray set with round brilliant cut diamonds, the diamonds all totalling 1.7-1.9 carats, signed Gubelin and numbered, stamped 750, 7.0cm, 16.8g. 

Estimate £1,000 - £1,500

MARCUS, AN ART DECO RUBY AND DIAMOND BAR BROOCH in platinum and white gold, set with transitional cut diamonds and French cut rubies, signed MARCUS, no assay marks, 4.9cm, 4.8g. 

Estimate £800 - £1,200

AN ANTIQUE TURQUOISE BOW BROOCH designed as a stylised bow set with round cabochon turquoise, suspending a drop of similar design, glass covered locket panel to the reverse, no assay marks, 7.1cm, 18.3g. 

Estimate £1,000 - £1,500

AN ANTIQUE AUSTRIAN MULTIGEM BIRD BROOCH in silver, designed as a bird perched on a branch set with a baroque pearl, the wings set with round and cushion cut rubies and pearls, the plume set with cushion cut emeralds, the eye set with a round cabocho

Estimate £2,000 - £3,000

A FINE ANTIQUE ROCK CRYSTAL, DIAMOND, PEARL AND ENAMEL SWEETHEART BROOCH in yellow gold, set with a polished rock crystal, with an applied sweetheart motif set with rose cut diamonds, in a border of red and white enamel accented by pearls, no assay m

Estimate £800 - £1,200

AN ANTIQUE DIAMOND FERN BROOCH in yellow gold and silver, set throughout with old cut diamonds, no assay marks, 5.9cm, 4.8g. 

Estimate £400 - £600

NO RESERVE - A GEMSET FLOWER VASE BROOCH designed as a vase of flowers, the flowers set with round cut garnets, blue zircon and chrysoberyl, the vase relieved in red, blue, white and green enamel, no assay marks, 3.8cm, 7.3g. 

Estimate £150 - £250

AN ANTIQUE DIAMOND CORONET BROOCH in yellow gold, set with old cut and rose cut diamonds, the diamonds all totalling 1.0-1.2 carats, no assay marks, 3.7cm, 6.6g. 

Estimate £1,000 - £1,500

A GEMSET JARDINIERE BROOCH, 1950S in 18ct white gold, modelled as plant in a stemmed pot, set with carved rubies, cabochon sapphires and emeralds and brilliant and baguette cut diamonds, indistinct assay mark, stamped 750, 3.3cm, 10.6g.

Estimate £2,500 - £3,500

A RETRO SAPPHIRE AND DIAMOND FLOWER BROOCH designed as a flower, the flower head set with a cluster of round cut diamonds, accented by old and rose cut diamonds, no assay marks, 6.4cm, 10.8g. 

Estimate £300 - £500

TIFFANY & CO., AN EMERALD AND ENAMEL CHEETAH BROOCH designed as a cheetah, the spots relieved in brown enamel, the eyes set with round cabochon emeralds, signed Tiffany, stamped 18K, 5.4cm, 19.9g. 

Estimate £2,500 - £3,500

A CHALCEDONY BROOCH set with an oval cabochon chalcedony in a foliate style border, no assay marks, 3.2cm, 7.8g. 

Estimate £200 - £300

MIKIMOTO, A PEARL BROOCH designed as a stylised floral spray set with pearls, Mikimoto maker's mark, stamped K14, 4.8cm, 17.1g. 

Estimate £500 - £700

AN ART DECO SAPPHIRE AND DIAMOND BOW BROOCH in platinum and 18ct white gold, designed as a stylised bow set with calibre cut sapphires and old and single cut diamonds, French import marks, 5.3cm, 8.9g. 

Estimate £1,800 - £2,200

A VINTAGE DIAMOND LILAC SPRAY BROOCH designed as a bouquet of lilacs tied with a bow, set with round brilliant and baguette cut diamonds all totalling 6.5-7.0 carats, signed HAB, no assay marks, 8.5cm, 29.7g.

Estimate £2,000 - £3,000

A DIAMOND FEATHER BROOCH designed as a stylised feather, set throughout with single and baguette cut diamonds all totalling 5.0-5.5 carats, no assay marks, 10.0cm, 35.4g.

Estimate £3,000 - £5,000

A SAPPHIRE AND DIAMOND FLORAL SPRAY BROOCH designed as a stylised floral spray set with round cut sapphires and round brilliant cut diamonds, no assay marks, 5.0cm, 11.9g. 

Estimate £400 - £600

AN ANTIQUE CALIFORNIA GOLD RUSH AND ENAMEL BROOCH in yellow gold, designed as a bar brooch decorated with black enamel, accented by a fan motif set with polished pieces of gold bearing ore, no assay marks, 6.6cm, 8.8g. 

Estimate £500 - £700

AN ANTIQUE DIAMOND FLOWER BROOCH in yellow gold and silver, designed as a floral spray set throughout with old cut diamonds, the diamonds all totalling 1.0-1.2 carats, no assay marks, 4.7cm, 6.3g. 

Estimate £400 - £600

AN ANTIQUE SWISS ENAMEL BROOCH, CIRCA 1840 in yellow gold, of oval outline, set with an enamelled miniature of a man blowing a horn, with a reclining woman and goat, with a backdrop of mountains and a chalet, the setting with a scalloped border, no a

Estimate £400 - £600

AN ANTIQUE SWISS ENAMEL BROOCH in 18ct yellow gold, set with an oval plaque enamelled with a view of people in a field, against a backdrop of a Swiss town with mountains and a lake in the distance, within a border of vine design accented with green e

Estimate £400 - £600

AN ANTIQUE PEARL AND DIAMOND STAR BROOCH designed as a six rayed star set with pearls and an old cut diamond, no assay marks, 3.7cm, 7.7g.

Estimate £400 - £600