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An art deco synthetic sapphire and diamond jabot brooch, circa 1930 set with two oval-shaped synthetic sapphires, surrounded by old European-cut diamonds; estimated total sapphire weight: 7.00 carats; estimated total diamond weight: 2.25 carats; mounted in platinum; length: 3 1/8in.

An art deco synthetic sapphire and diamond jabot brooch, circa 1930 set with two oval-shaped synthetic sapphires, surrounded by old European-cut diamonds; estimated total sapphire weight: 7.00 carats; estimated total diamond weight: 2.25 carats; mounted in platinum; length: 3 1/8in.

AN ART DECO OPAL AND DIAMOND JABOT PIN  Designed as a openwork single-cut diamond feather, centering upon a bezel-set rectangular cabochon opal within a calibré-cut emerald surround, joined by a single-cut diamond, calibré-cut emerald and sapphire terminal, mounted in platinum and 18k white gold, circa 1925

AN ART DECO OPAL AND DIAMOND JABOT PIN Designed as a openwork single-cut diamond feather, centering upon a bezel-set rectangular cabochon opal within a calibré-cut emerald surround, joined by a single-cut diamond, calibré-cut emerald and sapphire terminal, mounted in platinum and 18k white gold, circa 1925

CHARLES HOLL  Un inusual Art Deco zafiro y un brazalete de diamantes,  engastado con zafiros Calibre de corte, bordeado por viejos diamantes de corte europeo, centrado por un óvalo cortado pesaje aprox zafiro. 2,50 ct, flanqueado por zafiros corte triangular, montado en platino y oro de 18 quilates. La montura está muy bien grabado en los lados. El óvalo de zafiro en el centro se fija al revés.  Circa 1925

CHARLES HOLL Un inusual Art Deco zafiro y un brazalete de diamantes, engastado con zafiros Calibre de corte, bordeado por viejos diamantes de corte europeo, centrado por un óvalo cortado pesaje aprox zafiro. 2,50 ct, flanqueado por zafiros corte triangular, montado en platino y oro de 18 quilates. La montura está muy bien grabado en los lados. El óvalo de zafiro en el centro se fija al revés. Circa 1925

An art deco star sapphire and diamond pendant/brooch, circa 1930  centering a round cabochon star sapphire within a double-row surround of single-cut diamonds, accentuated by four old European-cut diamond collets, suspended from a detachable diamond two-stone surmount; sapphire weighing approximately: 37.00 carats; estimated total diamond weight: 5.50 carats; mounted in platinum

An art deco star sapphire and diamond pendant/brooch, circa 1930 centering a round cabochon star sapphire within a double-row surround of single-cut diamonds, accentuated by four old European-cut diamond collets, suspended from a detachable diamond two-stone surmount; sapphire weighing approximately: 37.00 carats; estimated total diamond weight: 5.50 carats; mounted in platinum

Cartier broche draperie belonging to Marie-Emilie, countess Esterházy (1913), set in platinum, gold, old-cut round diamonds, five cushion-shaped sapphires for a total weight of 39,66 carats. Cartier named “broche draperie” those pendant brooches formed by two elements joint together by a pin, to which the pendant would be suspended, originally a “guirlande” style drape.

Cartier broche draperie belonging to Marie-Emilie, countess Esterházy (1913), set in platinum, gold, old-cut round diamonds, five cushion-shaped sapphires for a total weight of 39,66 carats. Cartier named “broche draperie” those pendant brooches formed by two elements joint together by a pin, to which the pendant would be suspended, originally a “guirlande” style drape.

An Art Deco sapphire and diamond brooch, by Mauboussin Paris, circa 1924. Set throughout with old European- and single-cut diamonds, and calibré-cut sapphires. The openwork platinum mount shows the typical 'millegrains' finish. Unsigned. Accompanied by the Mauboussin certificate of authenticity. Numbered, French maker's mark and French assay marks for platinum and 18 karat gold. #Mauboussin #ArtDeco #brooch

An Art Deco sapphire and diamond brooch, by Mauboussin Paris, circa 1924. Set throughout with old European- and single-cut diamonds, and calibré-cut sapphires. The openwork platinum mount shows the typical 'millegrains' finish. Unsigned. Accompanied by the Mauboussin certificate of authenticity. Numbered, French maker's mark and French assay marks for platinum and 18 karat gold. #Mauboussin #ArtDeco #brooch

Art Deco Platinum, White Gold, Carved Sapphire, Diamond and Simulated Emerald Jabot - C. 1920.

Art Deco Platinum, White Gold, Carved Sapphire, Diamond and Simulated Emerald Jabot - C. 1920.

A late art deco sapphire diamond and platinum brooch the double fan-shaped brooch centering a European-cut diamond accented by calibré-cut sapphires and transitional round brilliant-cut diamonds; estimated total diamond weight: 4.00 carats.

A late art deco sapphire diamond and platinum brooch the double fan-shaped brooch centering a European-cut diamond accented by calibré-cut sapphires and transitional round brilliant-cut diamonds; estimated total diamond weight: 4.00 carats.

Art Deco Platinum, Rock Crystal, Diamond and Emerald Brooch The modified hexagonal-shaped rock crystal plaque tipped by pierced fancy-shaped platinum terminals, accented by old-mine and single-cut diamonds and calibre-cut emeralds, with French assay mark, circa 1920.

Art Deco Platinum, Rock Crystal, Diamond and Emerald Brooch The modified hexagonal-shaped rock crystal plaque tipped by pierced fancy-shaped platinum terminals, accented by old-mine and single-cut diamonds and calibre-cut emeralds, with French assay mark, circa 1920.

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