A bi-colour diamond dress ring.

A diamond dress ring. The bi-colour, open band, with brilliant-cut diamond accent grooved terminals. Estimated total diamond weight 0.20ct. Stamped 750. Approximate ring size M. Weight 10.2gms.

A diamond dress ring. Of bi-colour design, the two brilliant-cut diamond interlinked curved lines, with tapered band. Estimated total diamond weight 0.25ct. Ring size M. Weight 3.4gms. Overall conditi

A gentleman's diamond dress ring. Of bi-colour design, the marquise-shape diamond collet, to the ridged shoulders and tapered band. Estimated diamond weight 0.65ct, I-J colour, P1 clarity. Weight 11.2

A gentleman's diamond dress ring. Of bi-colour design, the square-shape diamond line, to the raised shoulders and tapered band. Estimated total diamond weight 0.40ct, I-J colour, VS1-SI1 clarity. Weig

ANTONIAZZI CHIAPPE (attributed to) - a sapphire and diamond dress ring. The circular sapphire cabochon, with graduated baguette-cut diamond line sides, to the bi-colour tapered band. Indistinctly sign

A FANCY COLOUR DIAMOND DRESS RING in 18ct white gold, set with a cushion cut blue diamond of 1.01 carats in a border of round brilliant cut pink diamonds, and a cushion cut yellow diamond of 1.26 cara

A gentleman's 18ct gold diamond ring. Of bi-colour design, the brilliant-cut diamond, inset to a stepped panel, with grooved shoulders and tapered band. Estimated diamond weight 0.20ct, J-K colour, P1

A gentleman's 9ct gold diamond ring. Of bi-colour design, the brilliant-cut diamond square-shape panel, to the grooved shoulders. One diamond deficient. Estimated total diamond weight 1ct. Hallmarks f

A diamond cluster ring. Of bi-colour design, the vari-shape rose-cut diamond mosaic, to the textured mount and band. Maker's mark for Yossi Harari. Total diamond weight 1.85cts, estimated G-H colour,

An 18ct gold diamond crossover ring. Of bi-colour design, comprising seven brilliant-cut diamond crossover bands, with tapered sides. Total diamond weight 0.88ct. Hallmarks for Birmingham. Ring size O

A platinum diamond single-stone ring. Of bi-colour design, the brilliant-cut diamond, with bar sides and tapered band. Diamond weight 0.33ct, H-I colour, P1 clarity. Hallmarks for London. Ring size O.

An 18ct gold diamond band ring. Of bi-colour design, the brilliant-cut diamonds, inset to the plain band. Estimated total diamond weight 0.30ct. Import marks for London. Ring size L. Weight 6.9gms. Ov

A diamond cluster ring. Of bi-colour design, the rose-cut diamond, within a diamond point and engraved openwork surround. Foreign marks. Ring size P. Weight 4.2gms.

A diamond single-stone ring. Of bi-colour design, the old-cut diamond, with tapered shoulders. Estimated diamond weight 0.45ct, K-L colour, SI2-P1 clarity. Ring size J1/2. Weight 2.7gms.

A diamond three-stone ring. Of bi-colour design, the brilliant-cut diamond line, with single-cut diamond shoulders. Estimated total diamond weight 0.35ct. Ring size L1/2. Weight 2.7gms.

THEO FENNELL - an 18ct gold beryl and diamond 'Rainforest' ring. Of bi-colour design, the circular green beryl cabochon, hinged to reveal a frog, to the foliate and pave-set diamond band. Signed Fenne

A tsavorite garnet and diamond clover ring. Of bi-colour design, the pave-set tsavorite garnet and diamond clover, with chevron shoulders. Estimated total diamond weight 0.60ct. Ring size M. Weight 10

A diamond flexible ring. Of bi-colour design, comprising a series of textured batons and panel, with brilliant-cut diamond scattered accents. Estimated total diamond weight 0.25ct. Ring size N. Weight

An 18ct gold diamond and 'coloured' diamond cluster ring. Of bi-colour design, the brilliant-cut 'green' diamond, with similarly-cut 'green' diamond and diamond stepped surround. Estimated total colou

A mid 20th century gold diamond buckle ring. Of bi-colour design, the textured and tapered band, with diamond buckle motif. Ring size L. Weight 4.5gms.

DIAMOND DRESS RING The brilliant-cut diamond of yellow tint, within a bombé surround pavé-set with brilliant-cut diamonds, diamond untested for origin and natural colour, principal diamond a

A late Victorian 15ct gold old-cut diamond dress ring, with scrolling gallery and shoulders. Estimated total diamond weight 1.40cts.Principal diamond estimated weight 0.75ct, I-J colour, VS clarity. A

A diamond dress ring. Designed as two pear-shape diamonds, with old-cut diamond sides, to the grooved shoulders. Estimated total diamond weight 1.15cts, J-tinted colour, SI1-P1 clarity. Ring size J. W

A coloured diamond dress ring. The pear-shape 'brownish orange' diamond, with brilliant-cut diamond sides and plain band. Estimated total diamond weight 1.20cts. Diamond untested for natural colour or