A platinum single-stone ring, set with square-shape

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 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

(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 diamond single-stone ring claw-set with a cut-cornered square modified brilliant-cut diamond, to a plain band, mounted in platinum; with GIA later inscription number 6107374369, stating that the dia

Two 9ct gold gem-set rings. To include an early 20th century oval-shape garnet single-stone ring and a 1970s square-shape onyx ring with overlaid serpent detail. Hallmarks for Birmingham, 1919 and Lon

A SET OF TWO THREE STONE RINGS one in 18ct yellow gold and platinum, set with a square step cut ruby accented by two single cut diamonds, stamped 18ct & PT, size O1/2 / 7.5, 2.2g, one in 9ct yello

A diamond single-stone ring. The square-shape diamond, with tapered shoulders. Diamond weight 0.25ct, stamped to band, estimated H-I colour, SI clarity. Hallmarks for Birmingham. Ring size I1/2. Weigh

A diamond single-stone ring. The square-shape diamond, to the tapered shoulders and plain band. Estimated diamond weight 1ct, L-tinted colour, SI clarity. Ring size M. Weight 3.8gms.

An 18ct gold diamond single-stone ring. The square-shape diamond, with tapered shoulders. Estimated diamond weight 0.45ct, J-K colour, VS clarity. Hallmarks for Birmingham. Ring size K. Weight 3gms.

An 18ct gold diamond single-stone ring. The square-shape diamond, with tapered band. Estimated diamond weight 0.30ct, I-J colour, SI clarity. Hallmarks for London, 2010. Ring size N. Weight 3.9gms.

An 18ct gold diamond single-stone ring. The square-shape diamond, between brilliant-cut diamond tapered line sides. Principal diamond estimated weight 0.20ct, H-I colour, SI2-P1 clarity. Hallmarks for

An 18ct gold diamond single-stone ring. The square-shape diamond, with tapered shoulders and plain band. Estimated diamond weight 0.50ct, H-I colour, P1 clarity. Import marks for London, 1997. Ring si

An 18ct gold diamond single-stone ring. The square-shape diamond, with tapered band. Diamond weight 0.35ct, stamped to band, estimated tinted colour, P1 clarity. Hallmarks for Birmingham. Ring size M.

A 1940s diamond single-stone ring set with a square French-cut diamond, each shoulder set with two French-cut diamonds, to a plain shank, stamped PLAT(Ring size: K)

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 selection of jewellery. To include a rectangular-shape citrine single-stone ring, a 9ct gold square-shape amethyst single-stone ring, a late Victorian 9ct gold citrine swivel fob, together with a pu

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

An 18ct gold diamond single-stone ring and a loose diamond. To include a brilliant-cut diamond single-stone ring, together with a loose square-shape diamond. Estimated total diamond weight 0.55ct, J-K

A diamond single-stone ring. The brilliant-cut diamond, with square-shape diamond line sides, to the angular shoulders. Principal diamond estimated weight 0.25ct, H-I colour, VS clarity. Ring size M.

An 18ct gold diamond single-stone ring. The brilliant-cut diamond, with square-shape surround and tapered shoulders. Estimated diamond weight 0.25ct, H-I colour, SI2-P1 clarity. Hallmarks for Birmingh

Two amethyst single-stone rings. The first designed as a square-shape amethyst with textured leaf and scrolling shoulders, the second designed as an oval-shape amethyst within a double collet surround

A diamond single-stone ring. The brilliant-cut diamond, within a square-shape surround and geometric engraved shoulders. Estimated diamond weight 0.25ct, J-K colour, VS clarity. Ring size O. Weight 3.

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