CASTELLANI: HARDSTONE CAMEO BAR BROOCH, CIRCA 1860The bloodstone carved to depict a Roman Emperor in profile, possibly Augustus, between two annul...

CIVILOTTI: ARCHAEOLOGICAL REVIVAL 'LAMB OF GOD' CROSS PENDANT, CIRCA 1860The micromosaic depicting the Lamb of God in polychrome tesserae on a go...

CASTELLANI: AGATE CAMEO AND GEM-SET PENDANT, CIRCA 1870The agate carved to depict Eros and Psyche, within a tiered ropetwist surround, accented by...

CASTELLANI: HARDSTONE INTAGLIO, ENAMEL, PEARL AND RUBY PENDANT/BROOCH, CIRCA 1860The banded agate engraved to depict Odysseus tied to a mast and a...

CASTELLANI: ARCHAELOGICAL REVIVAL BEAD RING, CIRCA 1860The turquoise enamel bead with 'evil eye' motifs, within a ropetwist mount with beadwork de...

CARLO GIULIANO: ENAMEL AND PEARL CHAIN, CIRCA 1880The fine chain necklace composed of turquoise enamel 'candy twist' batons, alternating with 3.5m...

CARLO GIULIANO: GOLD ARCHAEOLOGICAL REVIVAL NECKLACE, CIRCA 1860Composed of spherical gold beads of alternating sizes, the larger beads with granu...

DIAMOND AND ENAMEL 'NIGHT AND DAY' PENDENT EARRINGS, CIRCA 1880Each cushion-shaped diamond weighing 2.83 or 2.85 carats, suspended within a detach...

ATTRIBUTED TO ERNESTO PIERRET: EGYPTIAN REVIVAL GOLD SCARAB BRACELET, CIRCA 1870Composed of four highly sculptural, engraved, swivelling scarab b...

CARLO GIULIANO: PAIR OF ARCHAEOLOGICAL REVIVAL LAPIS LAZULI, ENAMEL AND GEM-SET BROOCHES, CIRCA 1870Each lapis lazuli cabochon in a ropetwist and ...

CARLO GIULIANO: ENAMEL PENDENT EARRINGS, CIRCA 1870Each delicate latticework panel with monochrome enamel decoration, with bead and scroll detail,...

CASTELLANI: PAIR OF GOTHIC REVIVAL SAPPHIRE BRACELETS, CIRCA 1865Of Byzantine inspiration, the tiered quatrefoil links set with sugarloaf and cabo...

CARLO AND ARTHUR GIULIANO: ENAMEL AND GEM-SET PENDANT, CIRCA 1895The pear-shaped garnet carbuncle, within a border of green guilloché enamel, the ...

SAPPHIRE, DIAMOND AND EMERALD BROOCH, CIRCA 1830The cushion-shaped sapphire and diamond open-back cluster within a surround of closed-back cushion...

DIAMOND AND PEARL TIARA/NECKLACE, CIRCA 1890The graduating foliate knifewire sprays set throughout with old brilliant, single and rose-cut diamond...

CARTIER: RUBY AND DIAMOND BROOCH, CIRCA 1910Each cushion-shaped, rose and single-cut diamond scrolling palm frond, entwined within a French-cut ru...

CARTIER: AMETHYST, DIAMOND AND SEED PEARL BROOCH, CIRCA 1908The amethyst cabochon, within a surround alternating with rows of millegrain-set rose-...

PEARL AND DIAMOND BRACELET/CHOKER COMBINATION, CIRCA 1925Each bracelet composed of circular and openwork rectangular links, graduating in size tow...

CARTIER: ENAMEL AND DIAMOND FOB WATCH, CIRCA 1910The circular engine-turned dial with Arabic numerals, inner minute divisions, blued steel hands, ...

EMERALD AND DIAMOND RINGThe step-cut emerald, weighing 16.23 carats, between trilliant-cut diamond shoulders, diamonds approximately 1.60 carats t...

CARTIER: DIAMOND BRACELETThe highly articulated flexible strap set throughout with brilliant-cut diamonds, signed Cartier, numbered 86NNGZ 1046, d...

YELLOW SAPPHIRE AND DIAMOND RINGThe cushion-shaped sapphire, weighing 15.02 carats, between trios of brilliant-cut diamonds, diamonds approximatel...

CARTIER: AMETHYST AND DIAMOND NECKLACEThe amethyst cabochon within a brilliant-cut diamond surround, to a tapering curb-link chain, signed Cartier...

BULGARI: 'CAMPANILE' DIAMOND-SET NECKLACEThe ropetwist chain suspending a series of bicoloured ringing bells, one pavé-set to the front with brill...

DIAMOND SINGLE-STONE RING, 1995The step-cut diamond, weighing 8.71 carats, in a bicoloured 18 carat gold collet setting, UK hallmark, ring size S...

RUBY AND DIAMOND RINGThe cushion-shaped ruby, weighing 7.10 carats, between old brilliant-cut diamonds, diamonds approximately 2.70 carats total,...

DIAMOND AND COLOURED DIAMOND RINGThe marquise-cut Fancy Vivid Yellow diamond, weighing 2.20 carats, between baguette-cut diamond shoulders, number...

EMERALD AND DIAMOND 'NIGHT AND DAY' PENDENT EARRINGSEach emerald cabochon suspended within a surround of marquise and brilliant-cut diamonds, bene...

DIAMOND BRACELET, MID 20TH CENTURYThe central oval plaque set with an old brilliant-cut diamond, between buckle motifs pavé-set with brilliant-cu...

EMERALD AND DIAMOND PENDANT NECKLACE, CIRCA 1970The detachable pendant set with a pear-shaped emerald, weighing 17.73 carats, within a surround of...

CHAUMET: DIAMOND-SET PURSE, CIRCA 1975Of bicoloured mesh linking, the brilliant and single-cut diamond scalloped clasp opening to reveal a bevel-e...

BOODLES: DIAMOND PENDANT NECKLACEThe brilliant-cut diamond, weighing 4.02 carats, surmounted by a tapered baguette and brilliant-cut diamond, in a...

DIAMOND DRESS RINGThe brilliant-cut diamond, weighing 9.39 carats, within a surround of tapered baguette-cut diamonds, between brilliant and step-...

EMERALD AND DIAMOND PENDENT EARRINGS, CIRCA 1960Each pear-shaped emerald within a surround of pear-shaped and marquise-cut diamonds, suspending f...

DIAMOND BRACELET, MID 20TH CENTURYComposed of openwork quatrefoils connected via lozenge-shaped links, pavé-set throughout with brilliant and sing...

DIAMOND SINGLE-STONE RINGThe brilliant-cut diamond, weighing 7.23 carats, mounted in platinum, UK hallmark, ring size IFor further information on ...

EMERALD AND DIAMOND NECKLACEThe step-cut emerald beneath five marquise-cut diamonds, suspended from a fancy-link necklace set to the front with si...

DIAMOND NECKLACE/BRACELET COMBINATION, CIRCA 1965Designed as a highly flexible series of marquise-cut diamonds, between borders of alternating bri...

Lot withdrawn: please contact Bonhams for more information about this lot

RUBY AND DIAMOND RINGThe oval-cut ruby, weighing 8.35 carats, within a brilliant, marquise and tapered baguette-cut diamond surround, between trif...

DIAMOND RIVIÈREComposed of fifty-five cushion-shaped and old brilliant-cut diamonds, collet-set, the largest five diamonds weighing 3.10, 2.62, 2....

NATURAL PEARL AND DIAMOND RINGThe 13.3mm natural bouton pearl, between trios of marquise-cut diamonds, diamonds approximately 1.15 carats total, ...

NATURAL PEARL AND DIAMOND TIARA/NECKLACE, CIRCA 1890The graduating foliate volutes, set with 3.50 - 6.90mm bouton pearls, above a series of scroll...

DIAMOND TWO-STONE RING, EARLY 20TH CENTURYObliquely set with two cushion-shaped diamonds, weighing 2.06 carats or 2.16 carats, between single-cut ...

ART DECO EMERALD AND DIAMOND PENDENT EARRINGS, CIRCA 1930Each cushion-shaped emerald, weighing 7.97 carats or 10.15 carats, within a brilliant-cut...

DIAMOND PENDENT EARRINGS, LATE 19TH CENTURYEach pear-shaped diamond, weighing 3.91 carats or 4.24 carats, suspended from a cushion-shaped diamond ...

DIAMOND TIARA/CIRCLET/NECKLACE, CIRCA 1890Of 'Russian fringe' design, the articulated row of old cushion-shaped diamonds within box-collet setting...

BOUCHERON: ART DECO EMERALD AND DIAMOND BRACELET, CIRCA 1925Pierced with geometric motifs, set with old brilliant and single-cut diamonds and cali...

DIAMOND BRACELET, CIRCA 1935Composed of rectangular plaques with pierced geometric motifs, each millegrain-set with a graduating old brilliant-cut...

COLOUR-CHANGE SPINEL AND DIAMOND RING, EARLY 20TH CENTURYThe cushion-shaped spinel weighing 6.42 carats, between openwork single-cut and cushion-s...

DIAMOND PENDENT EARRINGSEach collet-set old brilliant-cut diamond, weighing 3.40 or 3.71 carats, suspended from a similarly-cut diamond surmount, ...

SAPPHIRE NECKLACE WITH ART DECO DIAMOND DOUBLE CLIP BROOCH, CIRCA 1930 AND LATERThe eight strands of 3.0mm - 7.0mm sapphire beads, graduating in s...

EMERALD AND DIAMOND BRACELET, CIRCA 1930Composed of three articulating openwork plaques, with repeating foliate motifs of Persian inspiration, eac...

SPINEL AND DIAMOND RINGThe cushion-shaped spinel, weighing 12.70 carats, between tiered brilliant-cut diamond shoulders, ring size NFootnotes:Acco...

NATURAL PEARL AND DIAMOND CLIP, EARLY 20TH CENTURYThe 14.0mm or 15.0mm natural pearl drops with scalloped rose-cut diamond caps, each suspended fr...

SAPPHIRE AND DIAMOND THREE-STONE RINGThe oval-cut sapphire, weighing 8.84 carats, between two old brilliant-cut diamonds, weighing 2.45 or 2.49 ca...

WILHELM SCHMIDT: AN EXCEPTIONAL BOULDER OPAL, GEM-SET AND HARDSTONE BUST, CIRCA 1890 Portraying Mars, the Roman god of War, in Ajax helmet surmoun...

DIAMOND SINGLE-STONE RING, EARLY 20TH CENTURYThe old brilliant-cut diamond, weighing 8.12 carats, between similarly-cut diamond shoulders, ring s...

EMERALD AND DIAMOND PENDENT EARRINGSEach step-cut emerald, weighing 4.85 carats or 5.01 carats, between baguette-cut diamonds set East to West, su...

GRAFF: DIAMOND AND COLOURED DIAMOND RINGThe radiant-cut Fancy Yellow diamond, weighing 5.22 carats, between brilliant-cut diamond shoulders, signe...