A DIAMOND 'PARENTESI' RING, BY BULGARI The collet-set square-cut diamond, within a brilliant-cut

AN EMERALD AND DIAMOND CLUSTER RING The collet-set oval-shaped emerald within a double brilliant-cut diamond frame, mounted in 18K gold, diamonds approximately 1.80ct total, ring size O

EMERALD AND DIAMOND CLUSTER RING, 1993 The oval-cut emerald within a brilliant-cut diamond surround, the shoulders set with square-cut diamonds, mounted in 18 carat gold, London hallmark, ring size ap

A diamond and gem-set dress ring. The pave-set garnet square-shape panel, within a brilliant-cut diamond surround, to the circular-shape peridot highlight sides and plain band. Ring size M. Weight 9.5

AN EMERALD AND DIAMOND RING Centering a square-cut emerald weighing approximately 1.10 carats, flanked by two collet-set round brilliant-cut diamonds, mounted in 18k gold, size 7 1/2

A DIAMOND SINGLE-STONE RING, BY BULGARI The central brilliant-cut diamond weighing 0.79ct within a four-claw setting, to a gallery pavé-set with similarly-cut diamonds, mounted in platinum, signe

An emerald and diamond cluster ring. The oval-shape emerald collet, within a brilliant-cut diamond halo and surround, to the similarly-set sides and plain band. Estimated total diamond weight 0.60ct.

CHOPARD - a 'Happy Diamonds' ring. The brilliant-cut diamond collet, free-moving within a square-shape glazed panel surround. Signed and numbered Chopard, 289012 0, 82/2938-20. Ring size M. Weight 12g

An emerald and diamond ring, the rectangular cut emerald collet set within a surround of tapered baguette cut and brilliant cut diamonds, approximately 2.80 carats total, stamped 18K, finger size L To

An emerald and diamond ring, the oval cut emerald within a collet setting, on a pierced shank set with brilliant cut diamonds, approximately 1.20 carats total, finger size N 1/2

A pair of diamond and ruby ear pendants. Each designed as a brilliant-cut diamond collet, suspended within a square-shape ruby and single-cut diamond hoop, to the similarly-set bar and surmount. Estim

A gem-set dress ring Collet-set with an oval cabochon sapphire within a raised mount, set with pairs of cabochon emeralds and rubies and bands of brilliant-cut diamonds (Ring size: N)

A DIAMOND COCKTAIL RING, BY MESSIKA Composed of a double hoop, the frontispiece pavé-set with brilliant-cut diamonds, to a floating brilliant-cut diamond at the centre within collet-setting, moun

A ruby and diamond set ring setting, the vacant circular collet setting within a surr ound of calibre cut rubies to a border of brilliant cut diamonds, stamped 750, finger size M 1/2; together with a

A blue stone ring, the oval cabochon blue stone collet set within a foliate detail surround accented with brilliant cut diamonds, stamped 750, finger size K 1/2

An 18 carat gold ruby and diamond ring, set with alternating square shaped rubies and brilliant cut diamonds, stamped 750 with full Sheffield hallmarks, finger size K

DIAMOND CLUSTER RING The square-cut diamond within a brilliant-cut diamond surround, between brilliant-cut diamond shoulders, partial UK hallmark, ring size approx. I½

Diamond, Platinum, Gold Ring Set Stones: Square brilliant-cut diamond weighing 2.00 carats; triangle-shaped diamonds weighing a total of 1.41 carats; square b

A DIAMOND DRESS RING, the frontispiece set with graduated baguette-cut diamonds within a surround of brilliant-cut diamonds, mounted in 18K gold, diamonds approximately 2.00cts total, ring size O

CHOPARD - a 'happy diamonds' ring. The free-moving brilliant-cut diamond collet, within a brilliant-cut diamond heart surround, to the tapered band. Signed and numbered Chopard, 9618 82/1084. Estimate

VAN CLEEF & ARPELS, A VINTAGE DIAMOND RING, 1970S in 18ct yellow gold, the tapering band pave set round brilliant cut diamonds within a gold border, signed VCA and numbered, French assay marks for 18c

Center set with one square brilliant cut diamond [J-K/VS2], approximately 0.70 carats, accented with 32 full cut round diamonds [G-I/VS], total approximate weight 0.60 carats; size 6, weighs 3.3 grams

A SAPPHIRE AND DIAMOND DRESS RING The elongated openwork plaque, centred by a collet-set old brilliant-cut diamond, accented by similarly-cut diamonds and marquise-shaped sapphires, to a polished hoop

A sapphire and diamond dress ring. The brilliant-cut diamond collet, within a similarly-cut diamond and calibre-cut sapphire panel, to the plain band. Principal diamond estimated weight 0.90ct, J-K co

A diamond dress ring. The brilliant-cut diamond collet, within a single-cut diamond panel, to the plain band. Estimated total diamond weight 0.50ct. Weight 3.7gms.