(173856) A platinum colour-treated diamond single-stone

A platinum diamond single-stone ring. The square-shape diamond, to the tapered shoulders and plain band. Estimated diamond weight 0.40ct, I-J colour, SI clarity. Hallmarks for Birmingham, 2001. Weight

A platinum diamond single-stone ring. The brilliant-cut diamond, to the tapered shoulders and plain band. Estimated diamond weight 2.35cts, I-J colour, P3 clarity. Hallmarks for London, 2004. Weight 5

A mid 20th century 18ct gold and platinum diamond single-stone ring. The brilliant-cut diamond collet, to the tapered shoulders and plain band. Estimated diamond weight 0.45ct, J-K colour, P1. Weight

(1345) A platinum diamond single-stone ring. The square-shape diamond, with tapered shoulders. Diamond weight 0.47ct, stamped to band, estimated K-L colour, SI2-P1 clarity. Hallmarks for London. Ring

A platinum diamond single-stone ring. The rectangular-shape diamond, with tapered shoulders. Diamond weight 0.40ct, stamped to band, estimated I-J colour, SI clarity. Hallmarks for London, 2006. Ring

A platinum diamond single-stone ring. The brilliant-cut diamond, with tapered shoulders. Diamond weight 0.33ct, stamped to band, estimated H-I colour, SI clarity. Hallmarks for London. Ring size L1/2.

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.

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

A platinum diamond single-stone ring. The brilliant-cut diamond, to the asymmetric shoulders. Estimated diamond weight 0.30ct, I-J colour, SI2-P1 clarity. Hallmarks for Birmingham. Ring size N. Weight

A platinum diamond single-stone ring. The rectangular-shape diamond, to the knife-edge sides and plain band. Diamond weight 0.34ct, stamped to band, estimated K-L colour, P1 clarity. Hallmarks for Bir

A platinum diamond single-stone ring. The square-shape diamond, with tapered band. Estimated diamond weight 0.25ct, H-I colour, SI clarity. Hallmarks for Birmingham. Ring size K 1/2. Weight 2,9gms. Ov

A mid 20th century platinum and 18ct gold diamond single-stone ring. The circular-cut diamond, with pave-set diamond line sides. Principal diamond estimated weight 0.30ct, I-J colour, P1 clarity. Ring

A platinum diamond single-stone ring. The brilliant-cut diamond collet, with tapered shoulders. Diamond weight 0.16ct, stamped to band, estimated H-I colour, P1 clarity. Hallmarks for London. Weight 3

A platinum single stone ring. Brilliant cut diamond in rub-over setting. Diamond: 0.2 ct. Colour H. Size: M. 5. approx. grms.

Two 18ct gold & platinum diamond rings: Gross weight 4.1g. Single stone approx. 20 points or 1/5th carat with diamond chip shoulders, ring size O. The 3 stone size K largest stone under 10 points (2)

TIFFANY & CO, SINGLE STONE DIAMOND PENDANT NECKLACE, in platinum. The single stone diamond suspending from a fine necklace. Necklace signed Tiffany & Co, pendant numbered. L. necklace 41 cm. 2.7 grams

TIFFANY & CO, SINGLE STONE DIAMOND PENDANT NECKLACE, in platinum. The single stone diamond suspending from a fine necklace. Necklace signed Tiffany & Co, pendant numbered. L. necklace 41 cm. 2.7 grams

A New 0.76 ct Diamond Single Stone Pendant D-E Colour Grade, SI1-S1-2 Clarity Grade On a 14K Hallmarked White Gold Setting,GIE Valuation £1800.00

DIAMOND SINGLE-STONE RING The step-cut diamond, weighing 6.30 carats, ring size J Footnotes: Accompanied by a report from GIA stating that the diamond is G colour, SI1 clarity. Report number 22255108

DIAMOND SINGLE-STONE RING The brilliant-cut diamond, weighing 5.36 carats, within a six-claw setting, ring size M Footnotes: Accompanied by a report from GIA stating that the diamond is F colour, SI2

DIAMOND SINGLE-STONE RING The brilliant-cut diamond, weighing 5.73 carats, in a brushed mount, ring size M Footnotes: Accompanied by a report from GIA stating that the diamond is I colour, SI1 clarity

DIAMOND SINGLE-STONE RING The brilliant-cut diamond, weighing 4.11 carats, ring size M Footnotes: Accompanied by a report from GIA stating that the diamond is K colour, SI1 clarity. Report number 2191

An 18ct gold diamond single-stone ring. The rectangular-shape diamond, to the tapered shoulders and plain band. Estimated total diamond weight 5-5.25cts, K-L colour, P1 clarity. Hallmarks for Birmingh

DIAMOND SINGLE STONE RING The brilliant-cut diamond, weighing 2.81 carats, ring size N Footnotes: Accompanied by a report from GIA stating that the diamond is K colour, VS2 clarity. Report number 2195