Early 20th century oval opal and old cut diamond cl

A PAIR OF EARLY 20TH CENTURY SAPPHIRE AND DIAMOND PENDANT EARRINGS, oval-cut sapphires in milgrain settings suspended from old-cut diamond-set articulated links, total estimated sapphire weight 4.67ct

MARCUS & CO: SAPPHIRE AND DIAMOND BROOCH/PENDANT, EARLY 20TH CENTURY The central oval-cut sapphire within an openwork quatrefoil border of floral and foliate motifs, millegrain-set throughout with old

SIGNED TIFFANY & CO. ART DECO PLATINUM, DIAMOND AND SAPPHIRE LOW DOME RING, early 20th century. Old European cut round diamond weighing approx 1.00 ct. Centered by two lines of six calibré-cut sapp

ornate gilt sterling silver ciborium by Punte Galleries, Baltimore, MD, early 20th century, adorned with 39 Old European cut diamonds and 18 amethysts, hand chased and engraved, applied filigree decor

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

An early 20th century diamond single-stone ring The old brilliant-cut diamond, weighing 4.03 carats, between tapered single-cut diamond three-stone shoulders, French assay marks(Ring size: N)

AN EARLY 20TH CENTURY DIAMOND CLUSTER RING a fancy yellow old-cut diamond within a pierced milgrain border of white old-cut diamonds, to fancy diamond-set shoulders. Estimated principal diamond weight

A FINE ANTIQUE DIAMOND DRESS RING, EARLY 20TH CENTURY in yellow gold and platinum, the scrolling face set with old cut diamonds accented by rose cut diamonds, no assay marks, size J / 4.5, 3.6g.

AN ANTIQUE DIAMOND TOI ET MOI RING, EARLY 20TH CENTURY in 18ct yellow gold, set with two old cut diamonds of approximately 0.55 and 0.52 carats, in a frame of further old cut diamonds, stamped 18CT, s

AN ANTIQUE PEARL AND DIAMOND RING, EARLY 20TH CENTURY in yellow gold, the openwork face set with an old cut diamond and two pearls in a border of rose cut diamonds, further rose cut diamonds set to th

AN EARLY 20TH CENTURY NATURAL SALTWATER PEARL AND DIAMOND BROOCH, three natural button pearls within an old-cut diamond-set foliate frame and suspending a pearl and diamond pendant drop. Estimated tot

A Burmese sapphire and diamond cluster ring. The early 20th century ovoid-shape Burmese sapphire, weighing approximately 4.50cts, and old-cut diamond cluster, to the later lower mount and replacement

AN EARLY 20TH CENTURY CONVERTIBLE DIAMOND FLORAL TIARA/NECKLACE CIRCA 1910With seven graduated old mine cut diamond set gold backed silver flower heads, with screw fittings verso, one later, with rose

AN EARLY 20TH CENTURY DIAMOND PENDANT NECKLACE The fine cable-link chain leading to a graduated row of old brilliant-cut diamonds, suspending a pierced drop with foliate detailing, similarly-set with

AN EARLY 20TH CENTURY DIAMOND AND PEARL BRACELET CIRCA 1920The pierced panels each set with a trio of old mine cut diamonds with rose cut diamond set shaped borders, approximately 4 carats total, with

AN EARLY 20TH CENTURY EMERALD AND DIAMOND NÉGLIGÉE PENDANT NECKLACE two old pear-cut diamonds within borders of calibré-cut emeralds, suspended from trace chains to a rose-cut diamond h

A LATE 19TH / EARLY 20TH CENTURY BLACK OPAL AND DIAMOND NECKLACE graduated oval black opals suspended from diamond-set knife-edge bars to black opal and diamond swag links, to a diamond-set double bar

AN ANTIQUE DIAMOND BRACELET, EARLY 20TH CENTURY in white gold or platinum, formed of alternating floral and geometric links jewelled with old round and rose cut diamonds, unmarked, 19.5cm, 34.3g.; AN

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 PAIR OF PEARL AND DIAMOND EARRINGS, EARLY 20TH CENTURY in white gold, each set with a pearl of 11.4mm, below drops set with old and single and rose cut diamonds, unmarked, 4.5cm, 8.5g.

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

A FINE ART DECO CEYLON NO HEAT SAPPHIRE, DIAMOND AND PEARL NECKLACE, EARLY 20TH CENTURY in platinum and yellow gold, set throughout with nine oval cut blue sapphires all totalling approximately 16.90

ANTIQUE BLACK OPAL AND DIAMOND RING, EARLY 20TH CENTURY mounted in yellow gold, claw-set with an oval black opal measuring 14.8 x 10.5mm,and weighing approximately 3.36 caarts, within a border of circ

THREE GEM-SET RINGS, LATE 19TH CENTURY - EARLY 20TH CENTURY 1st: Set with a pear-shaped ruby and sapphire, within a rose-cut diamond surround, surmounted by an old brilliant-cut and cushion-shaped dia