PLATINUM, SAPPHIRE AND DIAMOND BYPASS RING America, Early 20th Century Approx. 9.47 total dwt.

VINTAGE PLATINUM AND DIAMOND RING Mid- to Late 20th Century Central approx. 0.65 ct. round-cut diamond, approx. I1 clarity, K-L color, surrounded by 22 single-cut diamonds, approx. 0.22 ctw., and eigh

SIGNED TIFFANY & CO. ART DECO PLATINUM, DIAMOND AND SAPPHIRE LOW DOME RING, early 20th century. Old European cut round diamond weighing approx 1.00 ct. Centered by two lines of six calibré-cut sapp

TIFFANY & CO. PLATINUM AND DIAMOND RINGAmerican, late 20th- early 21st century, platinum. Twenty-two (22), approx. 2.87mm each and 1.76 total carat weight, channel set diamonds to band, marked to inte

PLATINUM, SAPPHIRE AND DIAMOND RING (NO RESERVE*) Approx. 5.18 total dwt. (* To be sold with no reserve above starting bid). An approx. 2.06 carat oval-cut sapphire, approx. 8.68 x 7.93 x 3.75mm, surr

EDWARDIAN PLATINUM AND DIAMOND RINGEarly 20th CenturyFull-cut diamonds, approx. 5.0mm x 3.6mm and approx. 4.6mm x 3.0mm, flanked by four small diamonds. Maker’s mark “SRS”. Size 3&#1

14KT WHITE GOLD, DIAMOND AND SAPPHIRE BYPASS RING Approx. 8.62 total dwt. (No Reserve*) An approx. 1.14 carat oval sapphire, approx. 6.8 x 5.6 x 5.4mm, an approx. 0.80 carat old European-cut diamond a

Art Deco Sapphire & Diamond Ring in Platinum , Early 20th century, platinum, American. Art Deco ring set with .60cttw diamonds I-G color and SI2-SI1 clarity and .50 cttw blue sapphires. Hallmark: Plat

PLATINUM, DIAMOND AND SAPPHIRE RING (NO RESERVE*) Approx. 4.31 total dwt. (* To be sold with no reserve above starting bid). An approx. 1.00 carat old European-cut diamond and an approx 1.50 carat cus

NO RESERVE - A SAPPHIRE AND DIAMOND CLUSTER RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an oval cut blue sapphire within a border of single cut diamonds, maker's mark SH&Co, st

AN ANTIQUE SAPPHIRE AND DIAMOND CLUSTER RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an oval cut sapphire within a halo of round cut diamonds, stamped 18ct Plat, size N / 6.5, 2

A diamond engagement ring. Early 20th century. Set in platinum. Approx. 3/4 carat t.w.Size 6.5

Antique platinum and diamond filigree ring with approximately .42 tcw., size 5 1/2, stamped platinum, weighs 3.2 grams/2.0 dwt., early 20th C

White gold and diamond early 20th century diamond ring .5cts. est. total weight, approx. size 5

TIFFANY & CO. PLATINUM DIAMOND & SAPPHIRE RINGAmerican, late 20th- early 21st century. A platinum band channel set with alternating diamond and sapphire, size 6.25. Weighing 6 grams

Platinum & diamond flower brooch, 20th c., set with marquise, circular and baguette cut diamonds, est 5.0 carats, G-H color, approx. 8.38 dwt. (total), unmarked Provenance: A Private Collection: 1111

This is an antique platinum diamond and emerald ring band dating to the early 20th century. The diamonds are VS clarity and GH color. The ring is a size 4.75US and it weighs a total of 2.5g. The band

Platinum with diamond bypass ring. European cut pave diamonds retro bypass ring. Ring size approx .6. Total weight including stones: 8.2 dwt. Descriptions, weights, sizes and conditions are our best j

An early 20th century platinum and gold, old and rose-cut diamond ring.Estimated total diamond weight 0.75ct. Ring size P. 5.3gms.

Early 20th Century Antique Estate-style Three diamond ring set in platinum. Each diamond approximately .12 CT. size 5.5. some wear from normal use. overall good. total weight: 2.9 grams / 1.8 dwt. Key

Four gem-set rings. To include an early 20th century 9ct gold sapphire and diamond ring, a 9ct gold pink sapphire and diamond crossover ring, together with two further rings. Estimated total diamond w

1910-1915 Edwardian diamond and platinum ring, comprising 1.25 ctw old European and swiss cut diamonds (I-J color, Si1-Si2 clarity), Duchess style. Fineness marked, PLAT. Approx. US 4.5, total weight

A mid 20th century platinum, sapphire and diamond cluster ring. The rectangular-shape sapphire, within a circular-cut diamond scalloped surround, to the openwork gallery. Estimated total diamond weigh

AN EARLY 20TH CENTURY SAPPHIRE AND DIAMOND CLUSTER RING an oval-cut sapphire within a fancy pierced milgrain border of round-cut diamonds, to diamond-set shoulders. Estimated total diamond weight 0.30

AN EARLY 20TH CENTURY SYNTHETIC COLOUR-CHANGE SAPPHIRE AND DIAMOND CLUSTER RING a cushion-cut synthetic colour-change sapphire within a milgrain border of round-cut diamonds. Estimated total diamond w