Grow a Synthetic Ruby Crystal: This is a crystal of potassium alum or potash alum. Food coloring was added to these crystals, which are clear when the alum is pure.

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Synthetic ruby ring A gorgeous synthetic ruby ring in a gold tone setting. Ring is size 8 Jewelry Rings

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A late 19th century diamond, ruby, synthetic ruby, paste and cultured pearl brooch Modelled a graduated old brilliant-cut diamond crescent with entwined old-cut diamond and vari-cut ruby and synthetic ruby serpent with green paste eyes, and later single cultured pearl accent, mounted in silver and gold, circa 1890

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AN ANTIQUE RUBY, SYNTHETIC RUBY, DIAMOND AND PEARL CHOKER. Designed as a graduated series of oval-cut rubies and one synthetic ruby, within rose-cut diamond surrounds, alternating with old-cut colored diamonds within x-form surrounds, set at the top with pearls, suspending a fringe of similar design, circa 1880, 11 3/4 ins., mounted in silver-topped gold

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Edwardian Synthetic Ruby, Ruby, and Diamond Pendant, Retailed by Koch, centering a pear-shaped synthetic ruby measuring approx. 9.00 x 5.40 x 3.90 mm, set in a flexible mount framed by rose-cut diamond melee, further set with circular-cut rubies and rose-cut diamond melee, millegrain accents, platinum-topped gold mount, suspended from a platinum delicate baton link chain, spaced by old European-cut diamonds, approx. total diamond wt. 2.10 cts., lg. 2, 16 in., within a signed fitted box.

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A multi gem-set tiara of scrolling openwork design, composed of highly stylized repoussé acanthus leaves and floral motifs, decorated with cabochon amethysts and emeralds, the center 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.

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Art Deco Synthetic Ruby Diamond & Platinum Dangle Earrings. Gorgeous Art Deco c.1910’s platinum earrings encrusted with synthetic rubies and rose cut diamonds.

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Art Deco Five Strand Platinum, Diamond and Synthetic Ruby Bead Bracelet and Pair of Clip-Brooches circa 1925

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