An onyx and diamond 'Pre Catelan' ring, by Dior.French assay marks, stamped Au750. Ring size O.

An onyx and diamond 'Pre Catelan' ring, by Dior.French assay marks, stamped Au750. Ring size O. 11gms.

A COLOMBIAN EMERALD AND DIAMOND RING set with a step cut emerald of 1.14 carats in a border of old cut diamonds, the band set with further old and round brilliant cut diamonds, no assay marks, size O

A NATURAL FANCY PURPLISH PINK DIAMOND AND WHITE DIAMOND RING set with an oval cut fancy purplish pink diamond of 2.41 carats, accented by single cut white diamonds, no assay marks, size O / 7.25, 3.7g

A DIAMOND AND ONYX DRESS RING set with an old European cut diamond of 4.46 carats in a calibre cut onyx border, further accented by a border of old cut diamonds, no assay marks, size R / 8, 6.1g.

NATURAL PEARL AND DIAMOND RING, CIRCA 1925 Set with a 9.9-10.1mm natural pearl between step-cut diamond shoulders, French assay mark, ring size approx. J Footnotes: Accompanied by a report from The Ge

An early 20th century diamond single-stone ring The old brilliant-cut diamond, weighing 4.03 carats, between tapered single-cut diamond three-stone shoulders, French assay marks(Ring size: N)

CARTIER: 'MAILLON PANTHÈRE' DIAMOND-SET RING Of brick-linking design, set to the front with brilliant-cut diamonds, signed Cartier, maker's mark, numbered, French assay mark, ring size approx. L&

The 1 carat center diamond VS1 in clarity and H range in color with 28 accent diamonds approximately .06 carats each, stamped mark of 14k, ring size 11, weight 11 grams. Provenance: The Joseph Candiot

BULGARI, WHITE GOLD AND DIAMOND BAND Round brilliant cut diamonds spelling out BVLGARI. Ring size 5 1/4. Stamp: 750 MADE IN ITALY (Italian assay mark) 51 (European ring size). Gross weight: 7.00 dwt.

Fine Quality 18 Karat Yellow Gold and Black Onyx Panther Ring with Emerald Accented Eyes. Ring size 8. Ring top measures 1-1/8 " x 1". Approx. weight: 27.2 grams. Bears Cartier mark, stamped 750. Cond

A BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut blue sapphire of 4.18 carats, within a graduated border of old cut and round cut diamonds, no assay marks, size N / 6.75, 4.0g. Accompa

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut blue sapphire of 6.12 carats, within a border of single cut diamonds, no assay marks, size N / 6.75, 5.4g. Accompanied by a gemmologic

AN UNHEATED YELLOW SAPPHIRE AND DIAMOND RING in platinum, set with a cushion cut yellow sapphire of 9.43 carats accented by old cut diamonds, stamped PLAT, size O / 7, 5.9g. Accompanied by a gemmologi

A BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 4.40 carats within a cluster of round cut diamonds, no assay marks, size M / 6, 6.3g. Accompanied by two gemmological repor

AN UNHEATED SAPPHIRE AND DIAMOND RING set with a cabochon sapphire of 11.91 carats, the shoulders accented by old mine cut diamonds, no assay marks, size H / 4, 4.8g. Accompanied by a gemmological rep

A 2.81 CARAT SOLITAIRE DIAMOND ENGAGEMENT RING set with a round brilliant cut diamond of 2.81 carats, no assay marks, size L / 6, 3.6g.

A RUBY AND DIAMOND TARGET RING set with an old cut diamond of 2.01 carats, within a square border set with step cut rubies, no assay marks, size J / 4.5, 2.8g.

AN ART DECO DIAMOND DRESS RING in platinum, set with an old cut diamond of 2.20 carats, between pairs of old cut diamonds, French assay marks for platinum, size L / 5.5, 5.8g.

A CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold, set with a cushion cut sapphire of 4.79 carats in a cluster of round brilliant cut diamonds, no assay marks, size K1/2 / 5.5, 6.7g. A

A SOLITAIRE DIAMOND ENGAGEMENT RING set with a round brilliant cut diamond of 1.74 carats, no assay marks, size N / 6.75, 4.4g.

A PINK AND WHITE DIAMOND CLUSTER RING set with an old cut pink diamond of 0.95 carats, in a cluster of old cut diamonds, the diamond all totalling 3.0-3.2 carats, no assay marks, size R / 8.5, 6.9g.

AN AMETHYST AND DIAMOND COCKTAIL RING in platinum, set with a cabochon amethyst in a border of round brilliant cut diamonds, the diamonds all totalling 1.0-1.1 carats, no assay marks, size J / 5, 15.9

AN EMERALD AND DIAMOND CLUSTER RING in 18ct yellow gold, set with a cushion cut emerald of 3.65 carats in a cluster of old cut diamonds totalling 1.8-2.0 carats, stamped 18ct, size O / 7, 7.4g.

A SAPPHIRE AND DIAMOND THREE STONE RING in 18ct white gold, set with an oval cut sapphire of 2.52 carats between two cushion cut diamonds both totalling 2.0-2.1 carats, stamped 18ct, size O / 7, 4.6g.