A platinum diamond band ring. The plain band with

A platinum diamond band ring. The plain band with brilliant-cut diamond gallery sides. Maker's marks for Charles Green & Son. Estimated total diamond weight 0.15ct. Hallmarks for Birmingham. Ring size

A platinum diamond band ring. The square-shape diamond scrolling line, inset to the plain band. Estimated total diamond weight 1.50 to 1.75cts. Hallmarks for London, 2007. Ring size T. Weight 9.4gms.

A gentleman's platinum diamond band ring. The brilliant-cut diamond, inset to the plain band. Hallmarks for London, 2005. Ring size R. Weight 10.3gms.

A platinum diamond half-circle eternity ring. The brilliant-cut diamond line, to the plain half-band. Total diamond weight 0.33ct, stamped to band. Hallmarks for Edinburgh. Ring size J 1/2. Weight 3.8

A platinum diamond five-stone ring. The rectangular brilliant-cut diamond, weighing 1.02cts, with graduated similarly-cut diamond sides, to the plain band. Accompanied by five diamond reports from GIA

A mid 20th century platinum diamond cluster ring. The old-cut diamond cluster, with pierced gallery and plain band. Estimated total diamond weight 1ct, I-J colour, SI clarity. French assay marks. Ring

A platinum diamond three-stone ring. The brilliant-cut diamond, with similarly-cut diamond sides to the plain band. Estimated total diamond weight 1.20cts, J-L colour, SI clarity. Hallmarks for Birmin

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 mid 20th century platinum diamond five-stone ring. The graduated old-cut diamond line, to the ridged shoulders and plain band. Estimated total diamond weight 0.65ct, I-J colour, SI1-P1 clarity. Weig

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

A platinum diamond ring. The brilliant-cut diamond, raised to the tapered baguette and brilliant-cut diamond sides, and plain band. Estimated total diamond weight 0.45ct. Principal diamond estimated w

A mid 20th century platinum diamond three-stone ring. The graduated brilliant-cut diamond line, with single-cut diamond line sides, to the plain band. Estimated total diamond weight 0.55ct, I-J colour

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 mid 20th century 18ct gold and platinum diamond three-stone ring. The graduated brilliant-cut diamonds, each within an illusion setting, to the tapered shoulders and plain band. Estimated total diam

A mid 20th century 9ct gold and platinum diamond three-stone ring. The graduated brilliant-cut diamonds, within a lozenge-shape surround, to the detailed shoulders and plain band. Estimated total diam

Two mid 20th century 18ct gold and platinum diamond three-stone rings. Each designed as three brilliant-cut diamonds, to the plain band. Estimated total diamond weight 0.45ct. Weight 5gms. Overall con

Ladies Tiffany & Company platinum and diamond solitaire ring, having (1) 0.24ct round cut diamond, color: E, clarity: VS2, presented on a plain band, marked inside band: "Tiffany & Co, PT 950, T97430,

Ladies Tiffany & Company platinum and diamond solitaire engagement ring, having (1) 0.24ct round cut diamond, color: E, clarity: VS2, presented on a plain band, marked inside band: "Tiffany & Co, PT 9

A platinum diamond half eternity ring. Designed as a series of brilliant and baguette-cut diamond lines, with bar spacers and plain half-band. Estimated total diamond weight 0.75ct. Hallmarks for Lond

Diamond and platinum engagement ring approx 1.1ct round center with 6 tiny pave diamonds and plain platinum wedding band. Size 6.25

A diamond single-stone ring claw-set with a round brilliant-cut diamond, to a plain band, mounted in platinum; together with a baguette and round brilliant-cut diamond half-eternity ring, mounted in p

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

A mid 20th century sapphire and diamond cluster ring. The rectangular-shape sapphire, within an old-cut diamond surround, to the grooved shoulders and plain band. Estimated total diamond weight 0.35ct