A 1970s bi-colour 18ct gold brilliant-cut diamond brooch, by David Thomas.May be worn as a

An 18ct gold diamond brooch. Of bi-colour design, with intertwined undulating bars and brilliant-cut diamond highlights. AF. Estimated total diamond weight 0.25ct. Hallmarks for London, 2013. Length 4

A brilliant-cut diamond bi-colour ballerina brooch.May be worn as a pendant.Total diamond weight 1.448cts, stamped to mount, estimated G-H colour, VS-SI clarity.Stamped 18K 750. Length 5cms. 12.9gms.

An 18ct gold diamond three-stone ring. The brilliant-cut diamond line, with bi-colour mount. Total diamond weight 0.33ct, stamped to band. Hallmarks for London. Ring size N. Weight 3.7gms.

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

LOUIS VUITTON - an 18ct gold diamond airplane charm. Of bi-colour design, the plane, with twin propellers and brilliant-cut diamond cockpit and windows, suspended from a geometric surmount, with later

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

An 18ct gold diamond band ring. Of bi-colour design, the brilliant-cut diamond openwork scrolling foliate motif, to the scroll engraved sides and polished back panel. Estimated total diamond weight 0.

A mid 20th century 18ct gold and platinum diamond single-stone ring. Of bi-colour design, the brilliant-cut diamond, with tapered shoulders and single-cut diamond accents. Principal diamond estimated

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 pair of 18ct gold diamond earrings. Each of bi-colour design, the brilliant-cut diamond quatrefoil, suspended from a graduated similarly-cut diamond line surmount. Estimated total diamond weight 0.6

An 18ct gold diamond cross pendant. Of bi-colour design, the brilliant-cut diamond cross, suspended from a tapered surmount. Total diamond weight 0.50ct, stamped to mount. Import marks for Sheffield,

An 18ct gold and platinum diamond three-stone ring. The graduated brilliant-cut diamond line, with bi-colour gallery and band. Estimated total diamond weight 0.30ct. Ring size K. Weight 1.6gms.

A diamond single-stone ring. Of bi-colour design, the brilliant-cut diamond, to the stepped shoulders and plain band. Diamond weight 0.20ct, stamped to the band, estimated I-J colour, P1 clarity. Hall

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

An 18ct gold cultured pearl and diamond brooch. Designed as a cultured pearl and brilliant-cut diamond wreath. May be worn as a pendant. Estimated total diamond weight 0.25ct. Hallmarks for 18ct gold.

18ct yellow gold & platinum brooch, collet-set with 3x brilliant-cut diamonds, G colour, VS2, central diamond approx 0.12ct. Other two 0.08ct each. 3.8 grams, 5.7cm.

14K yellow gold leaves style brooch set with 3 round brilliant modern cut diamonds weighing an approximative total of 0.18ct, purity: SI1, colour: G-H and with 5 round facetted cut sapphires.Weight: 7

An 18ct gold brilliant-cut diamond highlight bead-link necklace, by Jennifer Meyer.Estimated diamond weight 0.40ct, G-H colour, SI clarity.Hallmarks for London. Length 36.7cms. 14.8gms.

An 18ct gold brilliant-cut diamond 'Trinity' bracelet, on adjustable brown cord, by Cartier.Total diamond weight 0.17ct, estimated G-H colour, VS clarity.Swiss convention marks. Maximum length 21.5cms

An 18ct gold brilliant-cut diamond and black ceramic 'Ultra' ring, by Chanel.Estimated total diamond weight 0.40ct, G-H colour, VS clarity.Swiss convention marks. Ring size K1/2. 10gms.With maker's ca

An 18ct gold brilliant-cut diamond and peridot pendant.Estimated total diamond weight 0.15ct, H-I colour, VS1-SI1 clarity.Hallmarks for London.Length 5.2cms. 4.9gms.

An 18ct gold brilliant-cut diamond single-stone ring. Estimated diamond weight 0.25ct, H-I colour, P1 clarity. Hallmarks for London. Ring size K1/2. 2.6gms.

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

An 18ct gold amethyst and brilliant-cut diamond dress ring.Amethyst weight 5.31cts. Total diamond weight 0.35ct, estimated H-I colour, VS-SI clarity. Hallmarks for Birmingham. Ring size O. 6.6gms.We o