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A belle époque diamond bar brooch, circa 1910 The three collet-set old brilliant-cut diamonds, the largest to the centre, between graduating similarly and rose-cut diamond shoulders, diamonds approx. 1.05cts total, length 6.5cm

A pearl and diamond brooch/pendant necklace, circa 1910 The scrolling openwork plaque set with two pearls, cushion-shaped and old brilliant-cut diamonds, suspending a row of graduated collet-set old brilliant-cut diamonds, terminating in a similarly-cut diamond within a pierced Greek key motif border and a further single-cut diamond surround, millegrain-set throughout, to a fine trace-link chain, diamonds approx. 2.30cts total

A pink tourmaline and diamond negligee pendant, circa 1900. Each pear-shaped mixed-cut pink tourmaline within an old brilliant-cut diamond surround, suspended from articulated knife-edge bars collet-set with old brilliant-cut diamonds, to a similarly-set foliate surmount and a trace-link chain diamonds approx. 3.00ct. total, length: pendant 6.9cm., chain 46.5cm.

A diamond spray brooch, circa 1910. The floral spray set throughout with brilliant, single and baguette-cut diamonds, diamonds approx. 1.45cts total, length 6.2cm, fitted case

A pair of early 20th century ruby and diamond pendent earrings. The drop-shaped openwork plaques, millegrain-set with calibré-cut rubies and graduated old brilliant-cut diamond collets, the articulated diamond collet centres to the similarly-set diamond surmounts, later fittings, diamonds aprroximately 1.40 carats total, length 5.0cm

An aquamarine and diamond pendant The large step-cut aquamarine, within a brilliant-cut surround, to a similarly-cut diamond and circular-cut aquamarine surmount, diamonds approx. 0.80ct total, length 5.4cm

An early 20th century sapphire and diamond brooch pendant The openwork plaque of fine knife-wire, millegrain set brilliant and single-cut diamond detail, its centre issuing a stylised scroll of similarly set diamonds and calibré-cut sapphires, to an oval mixed-cut sapphire drop, diamonds approx. 4.00ct. total, length 8.0cm.

A belle époque sapphire and diamond brooch, circa 1905 In the Garland Style, composed of two old brilliant and rose-cut diamond wreaths with millegrain detail, each surrounding a cushion-shaped sapphire drop, connected by a rose-cut diamond fluttering ribbon with oval-cut diamond terminals, diamonds approximately 5.60 carats total, signed Cartier Paris to the edge of the sapphire collet.

An enamel and diamond pendant, circa 1900 The oval finely pierced plaque set with single and rose-cut diamonds and decorated with light blue enamel, suspending a pear-shaped diamond swing centre, principal diamond approx. 1.20cts, later swing centre, length 3.8cm

An enamel and diamond swallow brooch, circa 1900 Modelled as a swallow in flight, with black enamelled feathers, the head, wings and tail feathers highlighted with old brilliant and rose-cut diamonds, the eyes with circular-cut rubies, mounted in silver and gold, old brilliant-cut diamonds approximately 1.60 carats total, detachable brooch fitting, fitted case by Harvey & Gore, 1 Vigo Street, London W

An early 20th century sapphire and diamond 'en tremblant' brooch The brooch modelled as a spray of cornflowers, the central oval-cut sapphire with diamond tipped stamen surround, old round brilliant-cut diamond petals, issuing four oval-cut sapphire and rose-cut diamond set buds, the foliage with diamond detailing, length 85mm, the sapphires estimated to weigh approximately 4.30cts in total

A belle époque diamond bracelet, circa 1910 Composed of a series of openwork elliptical links millegrain-set with old brilliant, rose, and marquise-cut diamonds, diamonds approximately 10.00 carats total, numbered, length 17.8cm

A diamond spray brooch, circa 1965 Set with graduating ribbons of brilliant, baguette and single-cut diamonds, diamonds approximately 7.00 carats total, French assay marks

Edwardian emerald and diamond plaque ring, circa 1910. This beauty is millegrain rubover-set vertically with four old brilliant-cut diamonds weighing approximately a total of 0.60 carats. The four diamonds are surrounded by a calibre-cut emerald cluster set in yellow gold, within a old brilliant-cut diamond surround. The design is further embellished by a yellow gold scrolled mount and beautiful, delicate diamond-set leaf-adorned shoulders. Via Diamonds in the Library.

A pair of Art Deco style diamond earpendants of geometric design, each rub-over set old brilliant-cut diamond suspending further brilliant-cut and similarly-set baguette-cut diamonds, terminating in a pear-cut diamond drop, the diamonds estimated to weigh approximately 5.50ct., length 4.5cm.

A ruby and diamond brooch and earring suite. The navette-shaped openwork brooch of geometric and floral design, set throughout with baguette and single-cut diamonds, accented with graduated step and square-cut rubies, accompanied by a pair of pendent earrings en suite, diamonds approx. 1.65cts total, lengths: brooch 6.0cm, earring 5.9cm

A belle époque diamond, seed pearl & enamel sautoir, c, 1910. The woven seed pearl necklace linked by three openwork quatrefoil plaques of foliate design set with old brilliant-cut diamonds, suspending a locket with ribbon & garland decoration pierced & millegrain-set with old brilliant & single-cut diamonds, over an interchangeable guilloché enamel panel, the reverse with engraved monogram within an undulated surround, blue, green, white and pink panels provided.

A pearl, ruby and diamond bracelet, by Koch, circa 1915 The central row of millegrain-set pearl and cushion-shaped diamond clusters set alternately with old brilliant-cut diamond and calibré-cut ruby circlets, to a rose-cut diamond tapering border, signed Koch, pearls untested, length 19.0cm, fitted maker's case

A belle époque freshwater natural pearl, ruby and diamond brooch, circa 1905 The circular-cut ruby and single-cut diamond fluttering ribbon bow surmount suspending a large freshwater baroque pearl drop with rose-cut diamond cap, within a millegrain-set single-cut diamond wreath surround, accented by calibré-cut ruby ribbons, length 4.0cm, cased by Kirkby & Bunn, successors to Streeter, 44 Old Bond Street

An art deco diamond brooch, circa 1920 designed as an old-cut diamond draped tassel; estimated total diamond weight: 10.00 carats; mounted in platinum; length: 3 1/2in.

An early 20th century black opal and diamond bar brooch, circa 1915 Centrally-set with a circular cabochon black opal, between old brilliant and rose-cut diamonds, length 6.6cm