A DIAMOND BROOCH, EARLTY 20TH CENTURY of circular

Platinum & diamond flower brooch, 20th c., set with marquise, circular and baguette cut diamonds, est 5.0 carats, G-H color, approx. 8.38 dwt. (total), unmarked Provenance: A Private Collection: 1111

OPAL AND DIAMOND STARFISH BROOCH, 20TH CENTURY Pavé-set throughout with circular opal cabochons, with a central old brilliant-cut diamond star motif, each arm with a ridge of brilliant and old br

AN ART DECO RUBY, EMERALD, SAPPHIRE AND DIAMOND PIN BROOCH, EARLY 20TH CENTURY, POSSIBLY BY CARTIER in 18ct white gold, the pin terminated by concentric circular motifs articulated to rotate within on

An early 20th century diamond foliate brooch. Of circular outline, the openwork scrolling panel, set throughout with rose and old-cut diamonds. Estimated old-cut diamond total weight 0.20ct. Diameter

A mid 20th century diamond bar brooch. Comprising a circular-cut diamond collet line, with shared surround. Estimated total diamond weight 0.80ct. Length 4.9cms. Weight 3.6gms.

An early 20th century gold ruby and diamond brooch. The alternating old-cut diamond and circular-shape ruby line, to the textured curb-link bar. Estimated total diamond weight 0.10ct. Length 4.3cms. W

An early 20th century 15ct gold ruby and diamond bar brooch. Of openwork design, the old-cut diamond and circular-shape ruby collet line, with shared halo surrounds and old-cut diamond collet accent t

A mid 20th century sapphire and diamond floral spray brooch. The circular-shape sapphire, old and rose-cut diamond flowers, with similarly-cut diamond leaves and stem. Estimated total old-cut diamond

An early 20th century diamond and gem-set insect brooch. Designed as an old-cut diamond fly, with oval-shape sapphires highlights and circular-shape ruby eyes, atop a plain bar. Estimated total diamon

Two early 20th century gold gem-set bar brooches. To include a split pearl shamrock brooch, together with a rose-cut diamond, circular-shape sapphire, split pearl and cultured pearl fly brooch. Length

A 14K yellow gold pearl & diamond brooch, 20th century. 21 graduated cultured pearls and ten round cut modern diamonds. Wear from age & use.

A DIAMOND BROOCH, EARLY 20TH CENTURY in 14ct yellow gold and platinum, the scrolling body set with a fan of rose cut diamonds, accented by further rose cut diamonds and an articulated diamond drop, st

18k white gold & diamond brooch, earrings, 20th c., custom made in Hong Kong, brooch with center round stone approx. 1.89 cts, surrounded by marquise, pear, round and baguette shaped stones, approx. 1

CUSTOM TIFFANY & CO. & PALOMA PICASSO 18K GOLD & DIAMOND SEAGULL BROOCH: 20th C, America. 18k yellow gold brooch, custom mounted with a .47 carat round, faceted diamond (5x5mm), 1.625"l, impressed: TI

GOLD, ENAMEL, SAPPHIRE AND DIAMOND BROOCH, CIRCA 20TH CENTURY in a form of two intertwined gold and enameled flowers with diamond and sapphires cores 750 standard, illegible marks on the pin, weight:

A BELLE EPOQUE DIAMOND PENDANT / BROOCH, EARLY 20TH CENTURY in yellow gold and platinum, the foliate body suspending swags, jewelled throughout with old European, single and rose cut diamonds, the dia

A TIFFANY & CO. 18K GOLD, DIAMOND AND SAPPHIRE BROOCH, 20TH CENTURY. The rosette form pin with overlapping rows of fluted petals centered with 16 brilliant cut diamonds and 19 round cut blue sapphires

NO RESERVE - A PERIDOT AND DIAMOND BAR BROOCH, EARLY 20TH CENTURY, Made in 18 carat white gold and platinum, Octagonal step cut peridot, weighing approximately 3.71 carats, Single cut diamonds, Stampe

DIAMOND SPRAY BROOCH, MID 20TH CENTURY Of floral bouquet design, set throughout with old brilliant and cushion-shaped diamonds, diamonds approx. 4.45cts total, length 5.2cm

A mid 20th century diamond brooch. Designed as two alternately orientated foliate sprays, set throughout with vari-cut diamonds. Estimated total diamond weight 6.50 to 7cts, principal diamonds estimat

A DIAMOND AND ENAMEL BROOCH, EARLY 20TH CENTURY in platinum and yellow gold, the oval body of openwork design, set with a central old cut diamond between panels of blue guilloche enamel, accented by f

An early 20th century diamond brooch. The old-cut diamond, within a similarly-cut diamond ribbon surround, suspending an old-cut diamond two-stone drop. Estimated total diamond weight 0.75ct. Length 3

FINE CONTEMPORARY 18 KT. WHITE/YELLOW GOLD/DIAMOND/EMERALD/SAPPHIRE UNICORN BROOCH, 20TH C., W. 5.6 GR., L. 1 1/4"

A 14K WHITE GOLD AND DIAMOND BROOCH, LEAFY CLUSTER SWIRL, 20TH CENTURY, with an overall paisley design, a central cluster of twenty-three marquise cut diamonds ranging in size from .16ct. to .25ct. we