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Emerald, diamond, onyx and sapphire pendant-necklace, Mauboussin, circa 1925.

The pendant set with a cushion-shaped emerald weighing 25.50 carats, framed by calibré-cut emeralds and old European-cut, pear-shaped, marquise-shaped and baguette diamonds, anchored by 2 articulated fringes set with emerald-cut and baguette diamonds, calibré-cut emeralds and onyx segments, accented with old European-cut diamonds, sapphires and emeralds, total diamond weight approx 13.95 carats. Via Sotheby’s.

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Marlene Dietrich's Trabert & Hoeffer-Mauboussin emerald and diamond bracelet. Via Pinterest

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Mauboussin. A Tutti-Frutti Gem-Set Lapel Watch.

Designed as a carved ruby and circular-cut diamond surmount embellished with onyx and emerald accents, suspending an articulated line of graduated carved emeralds within an openwork diamond-set foliate motif accented with cabochon rubies, to a carved emerald depicting a bird within a black enamel and diamond surround, turning to reveal the rectangular-shaped watch case. Via 1stdibs.

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An art deco diamond, gem-set and enamel bracelet, Mauboussin, French, circa 1930.

designed as three lozenge-shaped panels centering carved sapphire and ruby leaves and an emerald bead, accentuated with old European and baguette-cut diamonds and black enamel detail, each with openwork oval-shaped spacers of baguette and old European-cut diamonds; signed Mauboussin, with French assay marks and maker’s mark; estimated total diamond weight: 13.90 carats; mounted in platinum. Via Bonhams

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PLATINUM, DIAMOND AND COLORED STONE 'TAJ MAHAL' BROOCH, MAUBOUSSIN, PARIS, CIRCA 1925. Via Sotheby's

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Gem-set, enamel and diamond brooch, Mauboussin, Paris, 1929. Via Sotheby's.

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AN ART DECO SAPPHIRE, DIAMOND AND ONYX NECKLACE, BY MAUBOUSSIN.

The cabochon star sapphire, weighing approximately 86.53 carats, suspended from a diamond, black enamel, onyx ring and carved sapphire top, to the detachable diamond-set link chain, circa 1926, chain 50.0 cm, pendant 7.6 cm, with French assay mark for platinum. Signed Mauboussin France. Via Pinterest

 

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Art Deco aquamarine and diamond necklace, Trabert and Hoeffer-Mauboussin, 1930's. Photo Sotheby's

Set with a step-cut aquamarine, with baguette diamond detail to a necklace set with circular- and single-cut diamonds, length approximately 515mm, signed T&HM, later chain signed Cartier, French assay marks. Estimate 37,000 — 55,000. Lot Sold: 68,500 CHF

Sotheby's. Magnificent Jewels and Noble Jewels. Geneva | 14 May 2012 - www.sothebys.com