AN ANTIQUE GREEN TOURMALINE, DIAMOND AND OPAL INSECT BROOCH in yellow gold and silver, designed as a winged insect, the body set with cushion cut green tourmalines totalling 9.5-10.0 carats, the wings set with old cut diamonds totalling 0.6-0.8 carat

Estimate £4,000 - £6,000

MELLERIO, A DIAMOND FLOWER BROOCH in platinum and 18ct white gold, designed as a floral spray set with old and single cut diamonds, the two principal diamonds weighing approximately 0.63 carats and 0.80 carats, signed Mellerio and numbered, French as

Estimate £7,000 - £9,000

AN ANTIQUE FRENCH SAPPHIRE, DIAMOND AND RUBY DRAGONFLY BROOCH in 18ct yellow gold and silver, designed as a dragonfly set throughout with cushion and oval cut sapphires and rose cut diamonds, the eyes set with round cut rubies, the sapphires totallin

Estimate £6,000 - £8,000

BEN ROSENFELD, A VINTAGE DIAMOND AND ENAMEL FLOWER BROOCH, 1973 in 18ct yellow gold, designed as two flowers set with round brilliant and single cut diamonds, the petals decorated with green enamel, BRLtd maker's mark, full British hallmarks for Lond

Estimate £2,000 - £3,000

A RARE ANTIQUE UNHEATED KASHMIR SAPPHIRE, PEARL AND DIAMOND PENDANT in yellow gold and silver, set with cushion cut sapphires of 0.89, 1.14, 1.16, 1.30 and 2.98 carats in a border of rose cut diamonds and pearls, with a laurel wreath frame set with f

Estimate £20,000 - £30,000

DREICER & CO., A FINE ANTIQUE BELLE EPOQUE ONYX AND DIAMOND BOW BROOCH designed as an openwork bow set with old European and round cut diamonds, accented by rows of polished onyx, black satin set to the reverse, signed Dreicer & C., no assay marks, 6

Estimate £2,000 - £3,000

VAN CLEEF & ARPELS, AN IMPORTANT DIAMOND BROOCH of foliate design, set with round brilliant and baguette cut diamonds, accented by a row of transitional cut diamonds the largest weighing approximately 1.83 carats, the diamonds totalling 17.0-18.0 car

Estimate £50,000 - £70,000

A FINE FRENCH SAPPHIRE AND DIAMOND FLOWER BROOCH in 18ct white gold, designed as a flower set with a cluster of oval and round cabochon sapphires accented by round brilliant cut diamonds, the stem set with further sapphires and diamonds, the diamonds

Estimate £6,000 - £8,000

VAN CLEEF & APRELS, A CORAL AND DIAMOND BROOCH in 18ct yellow gold, the textured circular brooch set with a segment of coral carved in fluted design accented by a segment of round brilliant cut diamonds, the diamonds totalling 1.2-1.4 carats, signed

Estimate £15,000 - £20,000

CARTIER, AN ART DECO DIAMOND AND ONYX BROOCH, EARLY 20TH CENTURY the curved body set with a trio of principal old cut diamonds accented by onyx, in a border of single cut diamonds, signed Cartier (part rubbed), 4.2cm, 5.1g.

Estimate £3,000 - £5,000

A VINTAGE ITALIAN CORAL AND DIAMOND ROSE BROOCH / PENDANT in 18ct white gold, designed as a rose with polished coral petals and petals pave set with round brilliant cut diamonds, partially obscured Italian assay marks, stamped 750, 5.0cm, 58.4g. 

Estimate £2,500 - £3,500

TIFFANY & CO., A DIAMOND AND RUBY HONEY BEE BROOCH the body set with round brilliant cut diamonds, the eyes set with round cut rubies, signed Tiffany & Co., stamped 750, 2.1cm, 6.7g. 

Estimate £2,000 - £3,000

AN AMETHYST GEODE, DIAMOND AND PEARL BROOCH in 18ct yellow gold, set with an amethyst geode slice accented by round cut diamonds and pearls, partial British hallmarks, 5.6cm, 32.3g. 

Estimate £800 - £1,200

AN ANTIQUE VICTORIAN SCOTTISH HARDSTONE AND CITRINE DIRK BROOCH designed as a dirk set with polished Scottish hardstones, accented by fancy cut citrines, no assay marks, 8.5cm, 10.9g. 

Estimate £600 - £800

AN ANTIQUE DIAMOND, PEARL AND ENAMEL SWEETHEART BROOCH in yellow gold and silver, the brooch decorated with green guilloche enamel and a border of white enamel, with an applied interlocking heart motif set with rose cut diamonds, accented by a border

Estimate £800 - £1,200

AN ANTIQUE SAPPHIRE, DIAMOND AND PEARL BROOCH in yellow gold and silver, the openwork body set with two cushion cut sapphires of approximately 2.38 and 2.62 carats, accented by rose cut diamonds and pearls, suspending a pearl drop, with loops for use

Estimate £4,000 - £6,000

AN ANTIQUE CORAL BROOCH the openwork brooch set with three coral cameos carved to depict the bust of a woman and two rams heads, suspending coral drops carved to depict roses, a swag chain set with further coral roses and a coral crop carved to depic

Estimate £1,800 - £2,200

AN ANTIQUE DIAMOND, PEARL AND ENAMEL SWEETHEART BROOCH in yellow gold and silver, the circular brooch decorated with blue guilloche enamel within a border of white enamel, with an applied interlocking heart motif surmounted by a lover's knot motif se

Estimate £800 - £1,200

AN ANTIQUE EMERALD AND DIAMOND BROOCH, LATE 18TH CENTURY in yellow gold and silver, the foliate style brooch set with an octagonal step cut emerald, accented throughout with rose cut diamonds, suspending a drop of similar design, no assay marks, 6.7c

Estimate £1,200 - £1,600