An aquamarine and diamond dress ring, the oval cabochon

TIFFANY & CO., JEAN SCHLUMBERGER, A STAR SAPPHIRE AND DIAMOND DRESS RING The oval cabochon star sapphire estimated to weigh between 55 to 60 carats, to crossover pavé set diamond leaf shoulders, ap

JADE AND DIAMOND DRESS RING The oval jade cabochon, weighing 8.45 carats, within a surround of marquise-cut and pear-shaped diamonds, the shoulders set with tapered baguette and brilliant-cut diamonds

AQUAMARINE AND DIAMOND DRESS RING The oval-cut aquamarine, within a brilliant-cut diamond surround, diamonds approx. 2.15cts total, ring size approx. L

AQUAMARINE DRESS RING The oval aquamarine cabochon, within a closed back setting, within a hammered mount, ring size approx. N½ For further information on this lot please visit Bonhams.com

A jade and diamond dress ring. The oval jade cabochon, with brilliant-cut diamond trefoil sides. Estimated total diamond weight 0.15ct. Ring size M. Weight 2.8gms. Jade untested.

A sapphire and diamond dress ring. The oval sapphire cabochon, to the single-cut diamond bark effect shoulders and similarly designed tapered band. Estimated total diamond weight 0.15ct. Weight 9.9gms

An emerald and diamond dress ring. The oval emerald cabochon, with brilliant-cut diamond sides, each diamond within a single-cut diamond loop. Estimated total diamond weight 0.90ct, principal diamonds

A rubellite and diamond dress ring, the oval rubellite cabochon set within an oblong stylised 18ct white gold mount, the shoulders set graduating diamonds, stamped BI USA, size O

A sapphire and diamond dress ring. The oval sapphire cabochon collet, to the single-cut diamond asymmetric leaf sides. Estimated total diamond weight 0.70ct. Weight 7.6gms.

An opal and diamond dress ring. The oval opal cabochon, to the brilliant-cut diamond scalloped sides and plain band. Estimated total diamond weight 0.10ct. Weight 4.3gms.

A 9ct gold aquamarine and diamond dress ring. The oval-shape aquamarine line, with single-cut diamond accents. Hallmarks for Birmingham. Ring size N. Weight 2.7gms. Overall condition good. Minor surfa

AN AQUAMARINE AND DIAMOND DRESS RING, centring an oval mixed-cut aquamarine within a surround of brilliant-cut diamonds and similarly-cut diamond shoulders, mounted in 14K gold, ring size M½

ELIZABETH LOCKE, AQUAMARINE AND DIAMOND RING Containing one oval cabochon aquamarine measuring approximately 25.15 x 20.20 x 13.55 mm and six round brilliant cut diamonds weighing approximately 0.40 c

A star sapphire and diamond dress ring. The oval star sapphire cabochon, to the tapered baguette-cut diamond sides and slightly tapered band. Weight 3gms.

An early 20th century platinum and 18ct gold coral and diamond dress ring. The replacement oval-shape coral cabochon, within a rose-cut diamond openwork panel surround, to the similarly-set diamond sh

A diamond and aquamarine dress ring, the oval mixed cut aquamarine within an abstract surround of claw set and pave set brilliant cut diamonds, approximately 1.04 carats total, finger size L

A TURQUOISE AND DIAMOND DRESS RING Set with an oval-shaped turquoise cabochon at the centre, within a surround of brilliant-cut diamonds, mounted in gold, diamonds approximately 2.70ct total, ring siz

An early 20th century 18ct gold diamond and opal dress ring. The oval-shape opal cabochon line, with old-cut diamond spacers. Hallmarks for Birmingham, 1916. Ring size N1/2. Weight 3.5gms. Overall con

NO RESERVE - AN ANTIQUE OPAL AND DIAMOND DRESS RING, Made in yellow gold, Three graduated oval cabochon opals, Old European brilliant cut diamonds (one replaced with a round brilliant cut diamond), No

NO RESERVE - AN OPAL AND DIAMOND DRESS RING, Made in yellow gold and platinum, Oval cabochon opal, weighing approximately 1.50 carats, Single cut diamonds, Stamped Plat,Size N / 6.75, Weight 2.0 grams

AN OPAL AND DIAMOND DRESS RING in 18ct yellow and white gold, set with an oval cabochon opal accented by round brilliant and princess cut diamonds, the diamonds all totalling 1.2-1.4 carats, British h

18K yellow gold ring featuring an oval cabochon aquamarine weighing approx. 9.47 cts, set in a foliate mounting with four bezel set rose cut diamonds, 0.15 ctw, sz 6, 11.9 grams

AN OPAL AND DIAMOND DRESS RING in high carat yellow gold and silver, set with an oval cabochon opal within a border of rose cut diamonds, with stylised decoration to the band, unmarked, size N / 7, 3.

AN ANTIQUE OPAL AND DIAMOND DRESS RING in 18ct yellow gold, set with a trio of graduated oval cabochon opals, accented by pairs of old European brilliant cut diamonds, full British hallmarks (partly o