A single stone diamond ring, approx 0.5ct, in high claw

A 1940s diamond single-stone ring claw-set with a round-cut diamond, each shoulder set with a tapered baguette-cut diamond, to a plain band(Ring size: M/N)

A diamond single-stone ring claw-set with a marquise-cut diamond, each shoulder set with five round brilliant-cut diamonds, stamped 750; with accompanying HRD report, dated 27.07.05, numbered 05017020

A diamond single-stone ring claw-set with a marquise-cut diamond, each shoulder set with baguette-cut diamonds and small eight-cut diamonds, to a plain band, unmarked(Ring size: K/L)

A diamond single-stone ring claw-set with a single old round-cut diamond, to a plain band, stamped 585, with Austrian marks(Ring size: O)

A diamond single-stone ring claw-set with a round brilliant-cut diamond, to a plain band, mounted in platinum; together with a baguette and round brilliant-cut diamond half-eternity ring, mounted in p

A SINGLE STONE DIAMOND RING LONDON 1982The step cut diamond with canted corners weighing 5.99 carats, in four claw settings, AJR Studio Ltd maker's mark and later signed BoucheronSize/dimensions: fing

SINGLE STONE DIAMOND RING The Asscher-cut diamond, weighing 4.59cts, in a four-claw setting, ring size S

A SINGLE STONE DIAMOND RINGThe brilliant cut diamond weighing 2.78 carats, in an eight claw settingSize/dimensions: finger size N Gross weight: 2.8 grams

A LATE VICTORIAN SINGLE STONE DIAMOND RING CIRCA 1900The cushion cut diamond weighing 3.71 carats in a claw setting, to a reeded shank Size/dimensions: finger size I 1/2Gross weight: 4.1 grams

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

An impressive single stone diamond ring, the old round brilliant cut diamond, estimated weight 2.61cts, in a plain raised six claw setting of white precious metal, tests for 18ct white gold; ring size

A DIAMOND SINGLE-STONE RING, the central brilliant-cut diamond measuring approx. 6.87x6.85 with brilliant-cut diamond shoulders within millegrain setting, mounted in 18K gold, ring size M

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 Set with a brilliant-cut diamond, weighing 3.76cts, ring size approx. P, cased by F.J. Cornfield Ltd., 8 North End Road, Golders Green, also at The Broadway, Mill Hill

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

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 cushion-shaped diamond, between bifurcated brilliant-cut diamond-set shoulders, mounted in platinum, maker's mark, London hallmark, ring size approx. O Footnotes:

DE BEERS: DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond, weighing 1.26 carats, mounted in platinum, signed De Beers, numbered C93092, partial UK hallmark, ring size approx. I½, maker

DIAMOND SINGLE-STONE RING Set with a cushion-shaped diamond, diamond approx. 2.20cts, ring size approx. O½ For further information on this lot please visit Bonhams.com

DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond weighing 1.50 carats, mounted in platinum, maker's mark DOM, European convention mark, partial UK hallmark, ring size approx. O Footnotes: Ac

DIAMOND SINGLE-STONE RING Set with a brilliant-cut diamond weighing 2.34cts, ring size approx. I

DIAMOND SINGLE-STONE RING Set with an old brilliant-cut diamond, diamond approx. 2.20cts, ring size approx. M

DIAMOND SINGLE-STONE RING The brilliant-cut diamond, weighing 2.11cts, ring size approx. O