An early 20th century platinum diamond brooch. Designed

Designed as dimensional knotted ribbon of OMC diamonds, approx. 9.45 cts TW. Early 20th c. Stamped Schumann & Sons. 2 1/2" x 2". 19.6 dwt.

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

An early 20th century 18ct gold diamond and split pearl crescent brooch. Designed as a graduated split pearl crescent, with old-cut diamond and split pearl stylised wreath detail. Estimated total diam

An early 20th century platinum and gold, turquoise and old-cut diamond cluster brooch.Turquoise estimated dimensions of 17.6 by 16 by 8.5mms.Estimated total diamond weight 3.90cts, G-I colour, SI1-P1

A pair of early 20th century 18ct gold and platinum lapis lazuli and diamond cufflinks. Each designed as two octagonal-shape lapis lazuli and rose-cut diamond cluster panels, to the connecting link. L

incisa e sbalzata, con tre diamanti centrali taglio vecchio e diamanti taglio rosa, cts. 4.00 totali circa. Cm. 9. Gr. 8 An early 20th Century platinum brooch with old cut diamonds and rose cut diamon

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

A set of early 20th century 18ct gold and platinum mother-of-pearl and diamond dress studs. Each designed as an old-cut diamond collet, within a mother-of-pearl surround with engraved border. Estimate

Three brooches 19th-early 20th centuryComprising two 19th Century brooches, one shell cameo and metal brooch, one garnet and gold dome brooches, and one platinum, diamond and synthetic sapphire bar p

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 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

Italy, early 20th century. Stamped 'K.18 ITALY' yellow gold brooch designed as a serpent, set with rose cut diamonds and emeralds. Total diamond weight approx. 1.10cts. Emeralds set in the head and ta

Victorian/Edwardian platinum and multicolor 14K gold, diamond and cultured pearl brooch. Stamped, "B14K". 11.7 grams. 1.875"L, Circa - Late 19th - Early 20th C. PROVENANCE: James Robinson, New York. F

AN ANTIQUE AMERICAN RUBY, SAPPHIRE AND DIAMOND BIRD BROOCH / PENDANT, TIFFANY & CO EARLY 20TH CENTURY designed as a flying bird set with round and step cut rubies, French cut sapphires and rose cut di

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

An early 20th century split pearl and diamond pendant. Designed as an old-cut diamond and split pearl cluster, with split pearl foliate surround and surmount. May be worn as a brooch. Estimated diamon

This unique and artfully designed brooch, circa early to mid 20th century, is crafted in 18K yellow gold, weighing 14.6 grams and measuring 38mm long. This cute brooch is centered with a carved coral,

Edwardian brooch from beginning of 20th century designed as a half crescent, made of platinum (acid tested - the pin on the reverse is made of 18K Yellow Gold) and set with many lovely Old European Cu

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

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

11.4 grams total weight. With old European and mine cut diamonds, 15 total. 3.25 ct. total, largest diamond .38cts. VS - SI clarity and I-J-K color. Small chip on central diamonds. Top of pin platinum

An early 20th century platinum diamond cocktail watch. The circular-shape cream dial, with black Arabic numerals, within a single-cut diamond border, to the circular and rose-cut diamond pierced brace

A ladies early 20th century platinum diamond manual wind cocktail watch. The white dial with black Arabic numerals and minute track, with old and single-cut diamond bezel and expandable bracelet. Esti

TIFFANY & CO. - a lady's early 20th century platinum diamond cocktail watch. The circular-shape white dial with black Arabic numerals and minute track, with single-cut diamond double surround, similar