An early 20th century platinum and gold, independently rotating ruby and old-cut diamond concentric

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 platinum and gold, old and rose-cut diamond ring.Estimated total diamond weight 0.75ct. Ring size P. 5.3gms.

An early to mid 20th century platinum and 18ct gold old-cut diamond floral dress ring.Estimated total diamond weight 1.20cts, H-I colour, SI1-P1 clarity.Ring size O1/2. 3.3gms.

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 gold ruby and diamond three-stone ring. The circular-shape ruby line, with old-cut diamond double spacers, to the scrolling shoulders and plain band. Estimated total diamond weig

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

Two early 20th century platinum and 18ct gold diamond and gem-set rings. To include a diamond three-stone crossover ring, together with an alternating sapphire and old-cut diamond five-stone ring. Est

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

LATE 19TH-EARLY 20TH CENTURY YELLOW GOLD, DIAMOND AND RUBY BAND. Cushion-shape pinkish red ruby weighing app. .50 ct. Centered by four Old European cut round diamonds together weighing app. .50 ct.,

A SOLITAIRE DIAMOND DRESS RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an old cut diamond of 0.51 carats within a tapering band, stamped 18ct Plat, size K / 5.25, 2.4g.

SOLITAIRE DIAMOND RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an old cut diamond, between geometric shoulders, stamped 18ct Plat, size K / 5.25, 2.2g.

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.

A PAIR OF ANTIQUE DIAMOND DROP EARRINGS, EARLY 20TH CENTURY in yellow gold and platinum, each set with a row of three old cut diamonds suspending a cluster of old cut diamonds, stamped 18ct, 2.6cm, 4.

NO RESERVE - A DIAMOND TOI ET MOI RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with two old European cut diamonds, stamped 18ct Plat, size K / 5.25, 2.7g.

A DIAMOND TOI ET MOI RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, the stylised band terminated at either end with an old cut diamond, with further diamonds to the shoulders, no assay mar

NO RESERVE - A DIAMOND THREE STONE RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with a trio of graduated old cut diamonds within a stylised band, stamped 18ct, size M / 6.25, 2.9g.

NO RESERVE - A DIAMOND THREE STONE RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with a trio of graduated old cut diamonds within a stylised band, stamped 18ct, size M / 6.25, 2.9g.

NO RESERVE - A DIAMOND TOI ET MOI RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with two old European brilliant cut diamonds, stamped 18ct Plat, size K / 5.25, 2.7g.

Five gold gem-set rings. To include an early 20th century platinum and 18ct gold single-cut diamond three-stone crossover ring, an early 20th century 18ct gold and platinum synthetic ruby dress ring,

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

This is a superbly crafted ladies ring dating to the Edwardian era of the early 20th century. Rendered in fine 18K rose gold, the ring features Old European cut diamonds set in platinum. Accented with

AN ART DECO RUBY AND DIAMOND DRESS RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, the rectangular face set with a step cut ruby accented by single cut diamonds, stamped 18ct Plat, size M /