An early 20th century yellow sapphire and diamond set brooch,

AN EARLY 20TH CENTURY SAPPHIRE, PEARL AND DIAMOND HORSESHOE BROOCH, a horseshoe set with graduated old-cut diamonds, to a knife-edge bar set with a pearl and round-cut sapphires, total estimated diamo

A late 19th / early 20th century 18ct yellow gold, diamond, and sapphire ring, the mount set with graduted sapphires and diamonds, size R, 4.2 grams.

An early to mid 20th century yellow metal, diamond, and pink sapphire ring, set with a mixed marquise-cut sapphire within a border of round-cut diamonds, ring cluster approximately 11 x 8 mm, indistin

AN EARLY 20TH CENTURY SAPPHIRE AND DIAMOND BROOCH an oval-cut sapphire spaced by old-cut diamonds and oval-cut sapphires milgrain-set within a pierced wing frame. Estimated total diamond weight 0.30ct

A FINE ART DECO CEYLON NO HEAT SAPPHIRE, DIAMOND AND PEARL NECKLACE, EARLY 20TH CENTURY in platinum and yellow gold, set throughout with nine oval cut blue sapphires all totalling approximately 16.90

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

A SAPPHIRE AND DIAMOND DRESS RING, EARLY 20TH CENTURY in 18ct yellow gold, set with a trio of graduated cushion cut blue sapphires, accented by pairs of old cut diamonds, stamped 18ct, size O / 7.25,

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

An early 20th century diamond and gem-set insect brooch. Designed as an old-cut diamond fly, with oval-shape sapphires highlights and circular-shape ruby eyes, atop a plain bar. Estimated total diamon

Two early 20th century gold gem-set bar brooches. To include a split pearl shamrock brooch, together with a rose-cut diamond, circular-shape sapphire, split pearl and cultured pearl fly brooch. Length

Italy, early 20th century. Stamped 'K.18 ITALY' yellow gold brooch designed as a serpent, set with rose cut diamonds and emeralds. Total diamond weight approx. 1.10cts. Emeralds set in the head and ta

American, early 20th century. 14/15K yellow gold (tested with x-ray metal tester) serpent pendant with textured head and body, head set with oval cabochon sapphire and mine cut diamonds for eyes. Meas

An antique (ca early/mid 20th century) 14K yellow (rose-ish coloring) gold brooch, with pin back, featuring an oval emerald approx 7.5mm x 7mm, and with channel set and prong set old mine-cut diamond

MARCUS & CO: SAPPHIRE AND DIAMOND BROOCH/PENDANT, EARLY 20TH CENTURY The central oval-cut sapphire within an openwork quatrefoil border of floral and foliate motifs, millegrain-set throughout with old

An early 20th century Art Deco Period 14k White Gold filigree brooch with Diamonds and Sapphires. Features three prong set Diamonds, measuring approx. 2 and 3mm, estimated 0.19 cttw, with two rectangu

AN ANTIQUE AMERICAN RUBY, SAPPHIRE AND DIAMOND BIRD BROOCH / PENDANT, TIFFANY & CO EARLY 20TH CENTURY designed as a flying bird set with round and step cut rubies, French cut sapphires and rose cut di

An early to mid 20th century diamond and sapphire crossover ring set with an old cushion-cut diamond of approximately 0.45 carats, and an old round-cut sapphire, set in unmarked yellow metal (tests as

An early 20th century Art Deco Period 18k Gold filigree brooch with Diamonds and Sapphires. Features a central bezel set Diamond, measuring approx. 3mm, estimated 0.125 ct, with two rectangular facete

A DIAMOND AND ENAMEL BROOCH, EARLY 20TH CENTURY in platinum and yellow gold, the oval body of openwork design, set with a central old cut diamond between panels of blue guilloche enamel, accented by f

A DIAMOND BROOCH, EARLY 20TH CENTURY in 14ct yellow gold and platinum, the scrolling body set with a fan of rose cut diamonds, accented by further rose cut diamonds and an articulated diamond drop, st

Designed as an open-winged butterfly with round-faceted or cabochon opals, rubies, sapphires, emeralds and RBC diamonds, .60 ct. TW. Mid 20th c. Stamped 14k. 1 1/4" x 2". 10.7 dwt. Provenance: From th

An engraved gold hatching snake with OEC diamond eyes, approx. .01 ct. TW, and round cut sapphire accent, on chain; A green enameled snake and textured gold skull brooch. 14k. Early 20th c. 1 1/2" x 1

An early 20th century sapphire and diamond brooch. The kite-shape sapphire, with single-cut diamond surround, similarly-cut diamond line sides and old-cut diamond terminals. Estimated total diamond we

Two early 20th century diamond and gem-set brooches. To include an alternating square-shape emerald and old-cut diamond line brooch, together with a Martin Mayer green paste circle brooch. One with ma