A SINGLE STONE AQUAMARINE RING with diamond shoulders.

An Art Deco single stone black opal ring, An Art Deco single stone black opal ring, with diamond set shoulders. A circular tallow cabochon cut black opal, milligrain set to each shoulder, to a ridged

ART DECO EMERALD SINGLE-STONE RING, CIRCA 1920 The step-cut emerald, between single-cut diamond shoulders, numbered 248, size M Footnotes: Accompanied by a report from The Gem & Pearl Laboratory stat

A 9ct gold diamond single-stone crossover ring. The brilliant-cut diamond, to the asymmetric shoulders and plain band. Diamond weight 0.15ct, stamped to band, estimated I-J colour, SI clarity. Hallmar

A zircon single-stone ring. The circular-shape blue zircon, with single-cut diamond scroll shoulders. Approximate dimensions of zircon 11.3 by 11.3 by 7.1mms. Ring size G1/2. Weight 3.7gms.

JOHN DONALD: DIAMOND SINGLE-STONE RING AND DIAMOND-SET DRESS RING, 1990-2002 1st: Set with a pear-shaped diamond, between openwork abstract shoulders, mounted in 18 carat gold, 2nd: Of openwork bomb&#

Two 18ct gold diamond rings. The first designed as a brilliant-cut diamond single-stone ring with bifurcated shoulders, the second designed as three marquise-shape glass-filled rubies with brilliant-c

Two mid 20th century gold diamond rings. To include an illusion-set brilliant-cut diamond single-stone ring with foliate shoulders, together with a 9ct gold similarly-set diamond crossover ring with g

DIAMOND SINGLE-STONE RING Set with a step-cut diamond, weighing 7.01 carats, between brilliant-cut diamond shoulders, ring size approx. G (sizing spring)

DIAMOND SINGLE-STONE RING The brilliant-cut diamond, weighing 2.20 carats, between princess-cut diamond shoulders, ring size approx. O Footnotes: Accompanied by a report from The Gem Testing Laborato

DIAMOND SINGLE-STONE RING Set with an old brilliant-cut diamond weighing 2.27 carats, between single-cut diamond shoulders, ring size approx. M

A SINGLE STONE DIAMOND RINGThe step cut diamond with canted corners weighing 3.11 carats, in a four claw setting, set above two baguette cut diamond set shoulders, the shank stamped 18ctSize/dimension

DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond, weighing 1.99 carats, between tapered baguette-cut diamond shoulders, ring size approx. I (sizing band) For further information on this lot

DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond, weighing 2.16 carats, between tapered baguette-cut diamond shoulders, ring size I

A diamond single-stone ring. The brilliant-cut diamond, with tapered shoulders. Estimated diamond weight 5cts, I-J colour, P1-P2 clarity. Ring size M1/2. Weight 5.8gms.

DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond, weighing 3.53 carats, between similarly-cut diamond shoulders, ring size approx. J½

DIAMOND SINGLE-STONE RING The step-cut diamond weighing 1.48 carats, between baguette-cut diamond shoulders, ring size approx. I

A diamond single-stone ring. The old-cut diamond, with tapered shoulders and plain band, Estimated diamond weight 1.15cts, tinted colour, VS clarity. Ring size L. Weight 2.3gms. Overall condition good

A diamond single-stone ring. The brilliant-cut diamond, with crossover gallery and tapered shoulders. Estimated diamond weight 0.75ct, G-H colour, VS clarity. Ring size N. Weight 3.6gms.

A single stone diamond ring, the round brilliant cut diamond, estimated weight 0.80ct, in a four claw Tiffany style setting, to plain shoulders and shank, size P, unhallmarked yellow metal tests to at

A diamond single-stone ring. The old-cut diamond, with tapered shoulders and plain band. Estimated diamond weight 0.90ct, K-L colour, P1 clarity. Ring size P. Weight 3.6gms.

A single stone diamond ring, the old cut diamond in a six claw setting, estimated to weigh 0.51 carats, to marquise shaped shoulders, each set with an eight cut diamond, finger size L

A diamond single-stone ring. The old-cut diamond, to the openwork shoulders and knife-edge band. Estimated diamond weight 0.60ct, I-J colour, VS2-SI1 clarity. Ring size L. Weight 1.5gms. Overall condi

A diamond single-stone ring. The old-cut diamond, with engraved shoulders and tapered band. Estimated diamond weight 0.50ct, H-I colour, VS2-SI1 clarity. Ring size J. Weight 3.3gms.

A diamond single-stone ring. The brilliant-cut diamond, with tapered shoulders. Estimated diamond weight 0.50ct, I-J colour, P2-P3 clarity. Ring size K1/2. Weight 3.6gms.