A GREEN TOURMALINE, DIAMOND AND ENAMEL BROOCH, EARLY 20TH CENTURY in yellow gold, set with a rectangular step cut green tourmaline of approximately 12.75 carats in a border of white enamel, accented by single cut and rose cut diamonds and further whi

Estimate £4,000 - £6,000

A FINE DIAMOND BOW BROOCH in 18ct white gold, designed as a ribbon tied into a bow, set throughout with round brilliant cut diamonds, the diamonds totalling 14.5-15.0 carats, full British hallmarks, 6.0cm, 30.2g. 

Estimate £15,000 - £20,000

A VINTAGE TSAVORITE GARNET AND DIAMOND LIME BROOCH in 18ct yellow gold, designed as a wedge of lime, the segments pave set with round cut tsavorite garnets accented by marquise cut diamonds, the peel formed of textured gold, MP maker's mark, stamped

Estimate £4,000 - £6,000

A DIAMOND, RUBY, AND SAPPHIRE BIRD BROOCH in yellow gold, the body of the bird invisibly set with calibre cut rubies, the wings and tail set with round brilliant cut diamonds, the eye set with a cabochon cut ruby and the beak set with a cabochon cut

Estimate £2,000 - £3,000

AN ANTIQUE RUBY AND DIAMOND BAR BROOCH in yellow gold and silver, set with three cushion cut rubies accented by X motifs set with old cut diamonds, the diamonds all totalling 2.0-2.3 carats, marked indistinctly, 5.0cm, 8.3g. 

Estimate £1,000 - £1,500

AN ANTIQUE IMPERIAL TOPAZ CROSS PENDANT in rose gold, set with a round cut topaz suspending a cross set throughout with imperial topaz, all topaz totalling 15.0-17.0 carats no assay marks, 5.7cm, 8.6g.

Estimate £3,000 - £5,000

AN ANTIQUE DIAMOND STAR BROOCH in yellow gold and silver, designed as an eight pointed star set to the centre with an old cut diamond accented by further old cut diamonds, within a frame of old cut diamonds, the diamonds all totalling 3.5-3.8 carats,

Estimate £2,000 - £3,000

A VINTAGE DIAMOND BOW BROOCH in platinum, designed as a ribbon tied into a bow, set with old cut, rose cut, and single cut diamonds all totalling 2.3-2.6 carats, no assay marks, 3.6cm, 7.4g. 

Estimate £2,500 - £3,500

VAN CLEEF & ARPELS, A VINTAGE DIAMOND BROOCH in 18ct yellow gold and platinum, designed as stylised ribbon, set with round brilliant cut diamonds accented by twisted wirework, signed Van Cleef & Arpels NY and numbered, no assay marks, 5.6cm, 23.2g. 

Estimate £10,000 - £15,000

AN ANTIQUE DIAMOND BROOCH, 19TH CENTURY in yellow gold and silver, designed as a scrolling ribbon, set throughout with old cut diamonds, the diamonds totalling 3.5-4.0 carats, no assay marks, 3.5cm, 6.6g. 

Estimate £2,000 - £3,000

A FINE ANTIQUE CAMEO BROOCH in yellow gold, set with carved agate depicting Laocoon and his sons entangled by a snake, marked indistinctly, 5.8cm, 37.4g.

Estimate £5,000 - £7,000

A FRENCH DIAMOND BROOCH in 18ct white gold, designed as an openwork circle set throughout with round brilliant and baguette cut diamonds, the diamonds totalling 4.2-4.6 carats, French assay marks, 4.0cm, 13.2g. 

Estimate £4,000 - £6,000

A SET OF DIAMOND HAIR CLIPS in white gold, each hair clip in a scrolling design set with old cut diamonds, no assay marks, each clip measuring 4.3cm, 15.2g. 

Estimate £1,500 - £2,500

VAN CLEEF & ARPELS, A DIAMOND FLOWER BROOCH in 18ct yellow gold, designed as the head of a flower, set to the centre with a cluster of round brilliant cut diamonds, signed V.C.A, stamped 750 18KT FRANCE, French assay marks, 6.8cm, 27.3g. 

Estimate £4,000 - £6,000

A FRENCH AMETHYST, BLUE AND PINK SAPPHIRE BROOCH in 14ct yellow gold, set to the centre with a round cut amethyst of approximately 5.61 carats, accented by round cut blue and pink sapphires, French assay marks, 4.0cm, 14.4g. 

Estimate £2,000 - £3,000

FRED, A VINTAGE AQUAMARINE, SAPPHIRE AND DIAMOND BROOCH in 18ct yellow gold, set with briolette cut aquamarines in a central cluster to fluted stylised leaves set throughout with diamonds and sapphires, signed Fred Paris, maker's mark, French assay m

Estimate £10,000 - £15,000

TIFFANY AND CO., A DIAMOND FLOWER BROOCH in yellow gold, designed as the head of a flower, the anthers set with round brilliant cut diamonds, signed Tiffany & Co., stamped 750, 4.5cm, 18.0g. 

Estimate £3,000 - £5,000

A DIAMOND BOW BROOCH designed as a ribbon tied into a bow set throughout with round brilliant cut diamonds, the diamonds all totalling 2.3-2.5 carats, no assay marks, 6.4cm, 10.4g. 

Estimate £2,000 - £3,000

AN ART DECO TURQUOISE, ONYX AND DIAMOND BROOCH in geometric design, set with three cabochon turquoise in borders of calibre cut onyx, accented by old and rose cut diamonds, no assay marks, 5.2cm, 15.3g. 

Estimate £2,000 - £3,000

VAN CLEEF & ARPELS, AN IMPORTANT DIAMOND BIRD BROOCH designed to depict a stylised crested bird, set with a principal pear shaped old cut diamond of approximately 1.20 carats, accented throughout by further old cut diamonds, signed Van Cleef & Arpels

Estimate £60,000 - £80,000

A DIAMOND BOW BROOCH designed as a bow set to the centre with a round brilliant cut diamond of approximately 1.60 carats, the bow designed as a diamond set lattice suspending a kite shaped drop set with further round brilliant cut diamonds, the diamo

Estimate £5,000 - £7,000

BAILEY, BANKS & BIDDLE, AN ANTIQUE PEARL AND DIAMOND BOW BROOCH designed as a ribbon tied into a bow, set throughout with seed pearls accented by old cut diamonds, Bailey, Banks & Biddle maker's mark, no assay marks, 4.4cm, 7.4g. 

Estimate £2,000 - £3,000

AN ANTIQUE EDWARDIAN DIAMOND BOW BROOCH in yellow gold, designed as a ribbon tied into a bow, the openwork design set throughout with old cut and rose cut diamonds, no assay marks, 7.8cm, 12.3g. 

Estimate £2,500 - £3,500

VAN CLEEF & ARPELS, A VINTAGE TURQUOISE, SAPPHIRE AND RUBY BIRD BROOCH in 18ct yellow gold, designed as a bird set with an oval cabochon turquoise, round cut sapphires and round cut rubies, signed Van Cleef & Arpels and numbered, French assay marks,

Estimate £8,000 - £12,000

A FINE ANTIQUE DIAMOND BROOCH in yellow gold, set to the centre with an old European cut diamond of approximately 2.55 carats surmounted by a curved row of graduated old European cut diamonds, suspending three rows of old and rose each terminated wit

Estimate £20,000 - £30,000

AN ANTIQUE DIAMOND BOW BROOCH in yellow gold and silver, designed as a ribbon tied into a bow, set to the centre with an old cut diamond, the openwork bow set throughout with old and rose cut diamonds, the diamonds all totalling 3.8-4.2 carats, no as

Estimate £2,000 - £3,000

AN ANTIQUE FRENCH PEARL AND DIAMOND BROOCH in 18ct yellow gold, set with a pearl of 9.4mm in a double border of rose cut and old cut diamonds, accented by further pearls and twisted ropework, French assay marks, 3.3cm, 9.8g. 

Estimate £2,500 - £3,500

AN AUSTRIAN ANTIQUE DIAMOND AND AGATE CAMEO BROOCH, 19TH CENTURY in yellow gold and silver, set with a circular agate cameo depicting the bust of a woman in ruff collar, in a border of old cut diamonds, Austrian assay mark, 2.5cm, 5.5g.

Estimate £600 - £800

AN IMPORTANT ANTIQUE DIAMOND EN TREMBLANT DEVANT DE CORSAGE BROOCH, 19TH CENTURY in 18ct yellow gold and silver, designed as an articulated branch of flowers and leaves formed of a series of detachable sections, jewelled throughout with old cut and r

Estimate £30,000 - £50,000

VAN CLEEF & ARPELS, A VINTAGE SAPPHIRE AND DIAMOND FLOWER BROOCH in 18ct yellow gold, designed as the head of a flower, set to the centre with a cushion cut sapphire of approximately 6.28 carats in a double border of round brilliant cut diamonds, the

Estimate £20,000 - £30,000

A VINTAGE AQUAMARINE AND DIAMOND BALLERINA BROOCH designed to depict a lady dancing in a ballgown, jewelled with oval and step cut aquamarines accented by round cut and single cut diamonds, and a triangular step cut diamond, with a fringe of articula

Estimate £25,000 - £35,000

A DIAMOND SPRAY BROOCH designed as an abstract floral bouquet set with round brilliant cut and baguette cut diamonds, the diamonds all totalling 4.6 - 4.9 carats, no assay marks, 6.2cm, 19.1g. 

Estimate £2,000 - £3,000

J E CALDWELL, A DIAMOND CIRCLE BROOCH in white gold, designed as an openwork circle set throughout with old and round brilliant cut diamonds all totalling 4.0-4.2 carats, signed J.E.C & Co, no assay marks, 4.0cm, 10.4g. 

Estimate £3,000 - £5,000

A FRENCH ART DECO ONYX AND DIAMOND BAR BROOCH in platinum, the bar set with a row of old cut diamonds accented by polished onyx, the principal diamond weighing approximately 1.13 carats, the diamond totalling 1.5-2.0 carats French assay marks, 7.3cm,

Estimate £4,000 - £6,000

VAN CLEEF AND ARPELS, A VINTAGE FEUILLE LEAF BROOCH, 1990S in 18ct white gold, designed as a stylised leaf set throughout with round brilliant cut diamonds all totalling 1.0-1.2 carats, with a plain white gold tapered stem, signed VCA, French assay m

Estimate £6,000 - £8,000

A VINTAGE DIAMOND FLOWER BROOCH in 18ct white gold, designed as a flower set to the centre with a round brilliant cut diamond of approximately 0.80 carats, set throughout with further round brilliant and baguette cut diamonds, the diamonds totalling

Estimate £2,500 - £3,500

CARTIER, A VINTAGE CORAL AND DIAMOND BROOCH / PENDANT in 18ct yellow gold, set with a cluster of round brilliant cut diamonds in a border of polished coral beads, the textured domed body accented by further coral beads, with retractable pendant fitti

Estimate £12,000 - £16,000

TIFFANY & CO., A VINTAGE CITRINE BOW BROOCH in 14ct yellow gold, designed as a ribbon tied into a bow set to the centre with an octagonal step cut citrine, signed Tiffany & Co., stamped 14k, 8.7cm, 30.9g. 

Estimate £2,500 - £3,500

CARTIER, A VINTAGE TURQUOISE AND DIAMOND BROOCH in 18ct yellow gold, the leaf-shaped brooch set with polished oval cabochon turquoise and round brilliant cut diamonds, the diamonds all totalling 5.5-6.0 carats, signed Cartier Inc Made in France and n

Estimate £12,000 - £18,000

VAN CLEEF & ARPELS, A VINTAGE TURQUOISE AND DIAMOND FLOWER BROOCH in 14ct yellow gold, the head of the flower set with a cluster of round brilliant cut diamonds, the petals set with clusters of cabochon turquoise and round brilliant cut diamonds, the

Estimate £12,000 - £16,000

A PAIR OF AMETHYST, CITRINE AND DIAMOND BROOCHES in yellow gold, each in abstract shield design, each set with a fancy shield shaped amethyst and citrine respectively, accented by rows of round brilliant cut diamonds, the diamonds all totalling 4.0-4

Estimate £3,000 - £5,000

VAN CLEEF & ARPELS, A SAPPHIRE AND DIAMOND BROOCH in 18ct yellow gold, the brooch designed as a curved bar set to the centre with a cluster of four round cut sapphires with a round brilliant cut diamond to the centre, accented by further round brilli

Estimate £5,000 - £7,000

DAVID WEBB, A VINTAGE DIAMOND BROOCH in yellow gold and platinum, the scrolling body set with rows of round brilliant cut diamonds accented by twisted wirework, the diamonds all totalling 6.5-7.0 carats, signed WEBB, stamped 18K IRID PLAT, 4.5cm, 31.

Estimate £7,000 - £9,000

VAN CLEEF & ARPELS, A PAIR OF FRENCH SAPPHIRE AND DIAMOND LEAF BROOCHES in 18ct yellow gold, each designed as a stylised leaf set with a row of round cut sapphires and round brilliant cut diamonds, signed Van Cleef & Arpels and numbered, French assay

Estimate £10,000 - £15,000

A DIAMOND SPRAY BROOCH in yellow gold and silver, designed as a spray of three flowers, the flowers set en tremblant, the brooch set throughout with old cut diamonds, the diamonds all totalling 6.0-6.5 carats, indistinct assay marks, 6.4cm, 42.5g. 

Estimate £5,000 - £7,000

A FINE DIAMOND PLAQUE BROOCH set centrally with an old European cut diamond to an openwork body set with single cut and baguette cut diamonds, all totalling 7.0-7.5 carats, no assay marks, 7.4cm, 25.0g.

Estimate £6,000 - £8,000

CARTIER, A VINTAGE WHITE ENAMEL AND DIAMOND FLOWER BROOCH in 18ct yellow gold, the brooch modelled as a flower in white enamel accented by textured gold with an octagonal step cut diamond set to the centre, signed Cartier Paris and numbered, French a

Estimate £6,000 - £8,000

CARTIER, A BELLE EPOQUE PEARL AND DIAMOND BOW BROOCH, EARLY 20TH CENTURY designed as a ribbon tied in a bow, set to the centre with an old European cut diamond in a border of single cut diamonds, set with rows of pearls, further accented by single cu

Estimate £15,000 - £20,000

A FINE ANTIQUE DIAMOND BROOCH set throughout with old cut diamonds totalling 12.0-13.5 carats, no assay marks, 5.6cm, 20.5g.

Estimate £15,000 - £25,000