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A multi gem-set tiara Of scrolling openwork design, composed of highly stylised repoussé acanthus leaves and floral motifs, decorated with cabochon amethysts and emeralds, the centre set with a rose-cut diamond and garnet cross and a synthetic ruby and paste cluster, on a band of stained freshwater cultured pearls, all gemstones in foiled closed-back settings, mounted in silver gilt, composite, height at tallest point approx. 8.5cm.

A superb Arts and Crafts brooch, by Edith Linnell, United Kingdom, circa 1920. Double circle brooch set with sapphires, rubies and two large synthetic ruby cabochons, mounted in silver. #EdithLinnell #ArtsCrafts #brooch

An Art Deco onyx, ruby, synthetic ruby and diamond brooch, circa 1925. The cushion-shaped and old brilliant-cut diamond plaque, decorated with a stylised calibré-cut rubies, synthetic rubies and onyx flower, diamonds, later pin fitting. #ArtDeco #vintage #brooch

An art deco diamond and synthetic ruby double circle brooch, circa 1930 estimated total diamond weight: 1.80 carats; mounted in platinum; length: 1 5/8in

vibrant rubellite earrings combine the linear shapes of the emerald cut with the flowing movements of the oval cut. The double row of brilliant diamonds on the angular stone sets it apart from the single row design of the rounder gems. This piece reflects added dimension and a contemporized flair from the elegant Deco era. Robert Procop

RUBY, SYNTHETIC RUBY AND DIAMOND DOUBLE CLIP BROOCH, 1930S The clips of scroll design set with single-cut diamonds, calibré-cut rubies and synthetic rubies.

An art deco diamond and synthetic sapphire bracelet, circa 1935 estimated total diamond weight: 2.25 carats; mounted in platinum; length: 6 7/8in.

from Etsy

Art Deco Emerald Cut Ruby & Diamond Ring 3.79ct Synthetic Ruby Alternative Engagement Ring 10K Two Tone Gold Esemco July Birthstone Ring

AN ART DECO SYNTHETIC RUBY AND DIAMOND BRACELET. Composed of four openwork pavé-set panels of double-arch design linked with diamond-set three-line spacers, to the synthetic ruby line borders, 1930s, 18.2 cm, with Austrian assay mark for platinum. #ArtDeco #bracelet