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  • Mary O brien

    An early 19th century diamond tiara, circa 1810 The openwork triangular plaque set to the centre with a cluster of oval-cut, pear and cushion-shaped diamonds, surmounted by a pear-shaped diamond finial, between scrolling veloutes of smaller old brilliant and cushion-shaped stones, diamonds approximately 20.30 carats total, later rhodium plated, detachable to form three brooches, extra fittings supplied, later retailer's case by Garrard Co, 112 Regent Street, London, W1

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An antique diamond sunburst brooch/tiara, circa 1880 Designed as a rising sun, set throughout with old brilliant-cut diamonds, mounted in silver and gold, diamonds approximately 9.00 carats total, later tiara frame, brooch dimensions 3.7 x 10.1cm.

A multi gem-set tiara Of scrolling openwork design, composed of highly stylised repoussé acanthus leaves and floral motifs, decorated with cabochon amethysts and emeralds, the centre set with a rose-cut diamond and garnet cross and a synthetic ruby and paste cluster, on a band of stained freshwater cultured pearls, all gemstones in foiled closed-back settings, mounted in silver gilt, composite, height at tallest point approx. 8.5cm.

A diamond, ruby, emerald convertible tiara centering a floral motif detachable brooch, set with an oval-shaped ruby and emeralds, accented by old European-cut diamonds set in silver-topped gold, tiara with diamond-set serpents over an arch of rose-cut diamonds, with a fourteen karat gold and white metal head piece; estimated total diamond weight: 6.25 carats.

A ruby diamond and eighteen karat white gold necklace ruby weighing 2.00 carats; estimated total diamond weight: 1.40 carats; length: 16in.

VICTORIAN DIAMOND TIARA formed from three graduated open-work sunbursts, each set with a diamond to the centre, pave-set overall with graduated round old-cut diamonds, within a millegrain-set diamond leaf and scrollwork frame, set in silver and gold, the tiara detaches from the frame to form three separate pendants or brooches and a necklace, with four loose yellow gold screw fitments.

A ruby and diamond flower brooch Realistically modelled as a rose, the petals of french-cut rubies within concealed settings and brilliant-cut diamonds, enclosing a pear-shaped diamond, the stem and leaves of brilliant and baguette-cut diamonds, pear-shaped diamond approximately 0.50 carat, remaining diamonds approximately 2.00 carats total, length 8.5cm

Late 19thC diamond tiara of tapering openwork form, the centrepiece formed as a swagged foliate cartouche, set throughout w/ old round brilliant-cut diamonds, w/ tiers of graduated foliate accents to either side, similarly-set throughout & w/rose-cut diamond highlights, the frame set w/ row of rose-cut diamond accents, above a knife-edge bar support, the centrepiece detachable & w/ brooch fitting, length 19cm, diamonds estimated to weigh approx 6.78cts. Image Bonhams

late Victorian diamond necklace, convertable to a tiara, the necklace of ornate openwork foliate and scroll design with graduating cluster motifs, suspending three graduated detachable drops and garland motifs to each side, all to a diamond-set collet chain, set throughout with old brilliant- and old-cut diamonds, estimated to weigh a total of 22 carats, all silver cutdown collet-set to a yellow gold mount, with snap clasp and safety chain, the central section being detachable

A COLORED AND NEAR COLORLESS DIAMOND BROOCH The openwork pavé-set diamond plaque centering upon a navette-shaped diamond, enhanced by baguette and triangular-cut diamonds, suspending a detachable brown marquise diamond, mounted in platinum and 18K white gold, with French assay marks and maker's mark

Diamond ear pendants with 52.78-carat and 50.31-carat pear-shaped diamonds (117.04 carats total with surmounts), Christie's

An amethyst, diamond, and gem-set necklace featuring a square briolette-shaped amethyst, within an openwork frame, suspended from a triple-link chain of butterfly motif, completed by fringe, set throughout with round brilliant-cut diamonds, bead and oval-shaped rose quartz, circular-cut yellow sapphires, and briolette-shaped amethysts; estimated total diamond weight: 1.75 carats; mounted in eighteen karat white gold; length: 25½in.

Edwardian twin-stone pear-shape diamond ring. This resplendent diamond dinner ring, dating back to the first decades of the 20th century, scintillates with a bright-white and shining pair of pear-shaped diamonds set back-to-back atop a finely handcrafted setting rendered in platinum over 18 karat gold, accented with tiny old-cut diamonds. The dazzling pair of pear-shaped diamonds respectively weigh 1.20 carats and .80 carats ( 2.00 carats total). Via Diamonds in the Library.