Actress Maggie Gyllenhall wore this impressive, 1950s style, old mine diamond honeycomb bracelet with converted components by Fred Leighton to the 2010 Oscars. Set with a cabochon emerald, sugarloaf sapphires and diamonds, it oozes vintage Hollywood glamo

Actress Maggie Gyllenhall wore this impressive, 1950s style, old mine diamond honeycomb bracelet with converted components by Fred Leighton to the 2010 Oscars. Set with a cabochon emerald, sugarloaf sapphires and diamonds, it oozes vintage Hollywood glamo

Cartier Royal ring, platinum, one 22.75 carat sugarloaf sapphire from Ceylon, brilliant-cut diamonds.

Cartier Royal ring, platinum, one 22.75 carat sugarloaf sapphire from Ceylon, brilliant-cut diamonds.

A DIAMOND, SAPPHIRE AND EMERALD BROOCH, BY PAUL FLATO   Set with a detachable sugarloaf sapphire, weighing approximately 49.51 carats, accented by a tapered coil of calibré-cut sapphires and a graduated line of three carved emerald beads, each topped by a collet-set diamond, extending old European and single-cut diamond curling leaves, mounted in platinum, (accompanied by a contemporary bracelet mounting of later addition, with a central fitting for the cabochon sapphire from the brooch)

A DIAMOND, SAPPHIRE AND EMERALD BROOCH, BY PAUL FLATO Set with a detachable sugarloaf sapphire, weighing approximately 49.51 carats, accented by a tapered coil of calibré-cut sapphires and a graduated line of three carved emerald beads, each topped by a collet-set diamond, extending old European and single-cut diamond curling leaves, mounted in platinum, (accompanied by a contemporary bracelet mounting of later addition, with a central fitting for the cabochon sapphire from the brooch)

An exceptional cabochon Ruby by Bayco.

An exceptional cabochon Ruby by Bayco.

Art Deco Kashmir Sapphire and Diamond Ring, Trabert & Hoeffer Mauboussin, set with a sugarloaf cabochon sapphire measuring approx. 12.30 x 12.25 x 7.85 mm, flanked by diamond melee and baguettes, size 5 1/2, signed T & HM.

Art Deco Kashmir Sapphire and Diamond Ring, Trabert & Hoeffer Mauboussin, set with a sugarloaf cabochon sapphire measuring approx. 12.30 x 12.25 x 7.85 mm, flanked by diamond melee and baguettes, size 5 1/2, signed T & HM.

An Art Deco sapphire and diamond bracelet, circa 1935. The wide articulated strap composed of three scrolling openwork plaques, each set with a large sugarloaf cabochon sapphire, within a border of brilliant, baguette and single-cut diamonds, connected by baguette and brilliant-cut diamond buckle-shaped links. #ArtDeco #bracelet

An Art Deco sapphire and diamond bracelet, circa 1935. The wide articulated strap composed of three scrolling openwork plaques, each set with a large sugarloaf cabochon sapphire, within a border of brilliant, baguette and single-cut diamonds, connected by baguette and brilliant-cut diamond buckle-shaped links. #ArtDeco #bracelet

Platinum, Colored Stone, Diamond and Enamel Brooch, Mauboussin, France The potted flowering plant decorated with three carved sapphire leaves, accented by sugarloaf cabochon sapphires, carved ruby beads and carved emerald beads, further set with buff-top calibré-cut emeralds, completed by variously-cut diamonds weighing approximately 5.00 carats and applied with black enamel, signed Mauboussin, Made in France, numbered Y249, with French assay and workshop mark, one emerald missing; circa…

Platinum, Colored Stone, Diamond and Enamel Brooch, Mauboussin, France The potted flowering plant decorated with three carved sapphire leaves, accented by sugarloaf cabochon sapphires, carved ruby beads and carved emerald beads, further set with buff-top calibré-cut emeralds, completed by variously-cut diamonds weighing approximately 5.00 carats and applied with black enamel, signed Mauboussin, Made in France, numbered Y249, with French assay and workshop mark, one emerald missing; circa…

An Art Deco rock crystal, sapphire, ruby and diamond clip brooch, circa 1925, the shield-shaped rock crystal plaque decorated with a fluted sapphire, carved rubies and ruby cabochons, old brilliant and single-cut diamonds, capped by a faceted rock crystal and a three sugarloaf sapphires. #ArtDeco #clip #brooch

An Art Deco rock crystal, sapphire, ruby and diamond clip brooch, circa 1925, the shield-shaped rock crystal plaque decorated with a fluted sapphire, carved rubies and ruby cabochons, old brilliant and single-cut diamonds, capped by a faceted rock crystal and a three sugarloaf sapphires. #ArtDeco #clip #brooch

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