A DIAMOND PLAQUE BROOCH the pierced geometric brooch set with an old cut diamond of approximately

ART DECO SAPPHIRE AND DIAMOND BROOCH, CIRCA 1925 The openwork geometric plaque millegrain-set throughout with old brilliant and single-cut diamonds, accented by circular-cut sapphires, diamonds approx

A FINE ART DECO CORAL, DIAMOND AND ONYX BROOCH in 14ct yellow gold, set with a sugarloaf cabochon coral against a pierced geometric ground, accented by old and single cut diamonds and polished onyx ba

AN EDWARDIAN DIAMOND AND HALF PEARL CRESCENT BROOCH CIRCA 1910The circular gold crescent set with graduated half pearls and old mine cut diamonds, approximately 0.42 carats total, to a pierced gallery

Antique Gold, Bloodstone, and Diamond Brooch, Russiaset with a round bloodstone plaque centering on bezel set old rose cut diamonds weighing approximately .20 total carat (K-L color, SI-I clarity), wi

Platinum and Diamond Brooch The openwork plaque of scrolled pierced ribbons centering one old European-cut diamond ap. .85 ct., flanked by 6 baguette diamonds and clusters of 18 collet-set old-mine an

LACLOCHE FRÈRES: ART DECO DIAMOND-SET BROOCH, CIRCA 1925 The onyx plaque, applied with a giardinetto motif set with carnelian cabochons, old single-cut and rose-cut diamonds, the geometric border

A VINTAGE DIAMOND PLAQUE BROOCH, 1930s, in 18ct yellow gold and platinum, the openwork brooch set throughout with old cut diamonds, the diamonds totalling 3.0-3.5 carats, stamped 18ct and PL, 4.6cm, 7

Vintage White Gold and Diamond Bar Broochbar brooch set with old European cut diamonds (2.75mm - 4.25mm) weighing approximately 1.08 total carats (K-M color, SI-I clarity), with engraved decoration, c

ANTIQUE NATURAL PEARL AND DIAMOND BOW BROOCH set with old cut diamonds totalling approximately 3.54 carats and suspending a pearl drop of 9.1mm, 4cm, 9.7g. Gemological report: Natural, saltwater origi

Art Deco Platinum and Diamond Bar Broochthe shaped bar brooch set with old European and single cut round diamonds weighing approximately 1.33 total carats (H-I color, VS-SI clarity) and with synthetic

Mid 19th c Victorian rolled gold brooch pin set with 42 old mine cut round diamonds approximately 1 ct t.w. Pin is 1 7/8" long.

Art deco brooch set with five Old European cut diamonds. Center approximately .20 carat and four approximately .03 carat each, .42 CTW. Clarity SI2, Color H-I. 1-7/8" x 5/8". 3.0 dwt. IMPORTANT: Befor

A mid Victorian diamond brooch , circa 1870, the flower head shaped brooch set with old brilliant cut diamonds, mounted in gold backed silver, approximately 6.90 carats total, 3.2cm wide Offered for s

AN AQUAMARINE AND DIAMOND BROOCH in geometric design, set with three round cut aquamarines accented by lozenge motifs set with baguette and rose cut diamonds, suspending an old European cut diamond dr

ART DECO DIAMOND BROOCH, CIRCA 1930 Of openwork, geometric design, set with old brilliant-cut diamonds, diamonds approx. 2.70cts total, length 4.4cm

Platinum Diamond Flower Brooch Center set with one Old European cut Diamond [I/SI-2], approximately 0.71 carat, enhanced with 24 baguette cut Diamonds [H/VVS], approximate total weight 3.36 carats, fu

AN ANTIQUE DIAMOND PLAQUE BROOCH in rectangular design, set to the centre with an old cut diamond of 0.35 carats, the openwork body set with further old cut diamonds, the diamonds all totalling 2.8-3.

Belle Epoque diamond and blue enamel plique a jour flower brooch, center flower set "en tremblant", Old Mine Cut center diamond weighing approximately .60-.70 ct. (approx. J-K color, SI1 clarity), 73

A DIAMOND FLOWER BROOCH, set throughout with old brilliant, cushion and single-cut diamonds, diamonds approximately 4.00cts total, length 7.3cm

Silver-Topped Gold and Diamond Flower Motif Broochset with old European, mine, and oval cut diamonds weighing approximately 2.50 total carats (H-J color, VS-SI clarity), completed with a single lockin

Belle Epoque diamond and platinum brooch centered by a bezel set cushion old mine cut diamond weighing approximately 2.00 carats and two European cut diamonds 0.95 carats each, further accented by old

Three Gold and Gem-Set Bar Broochesto include: a platinum topped gold bar brooch set with old European cut diamonds weighing approximately .22 total carat (H-I color, VS2-SI1 clarity), completed with

KOCH: ART DECO SAPPHIRE AND DIAMOND GIARDINETTO BROOCH, CIRCA 1920 The pierced vase millegrain set with old brilliant, single and rose-cut diamonds, issuing similarly-set leaves and carved sapphire fl

Flower brooch set with central cushion cut diamond weighing approximately 1.30cts, the petals are further set with additional old cuts, total diamond weight approximately 4cts.