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A Belle Epoque platinum, gold, enamel and diamond bow brooch, French, circa 1910. Designed in pink enamel with old mine and rose-cut diamond accents, in platinum and 18k yellow gold, the back with elegant foliate patterned engraving in yellow gold. 2.75 x 2 inches. #BelleÉpoque #brooch

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from 1stdibs.com

Belle Epoque Sapphire Diamond Platinum Ring

Belle Epoque Sapphire and Diamond Ring Sapphires and Old Mine Cut Diamonds set in Platinum European Circa 1910

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from Rozental Antiques

Antique Art Deco Platinum Diamond & Sapphire & Emerald Ring

An Art Deco platinum, diamond, sapphire and emerald ring, 1920-35. #ArtDeco #ring

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Paulding Farnham for Tiffany & Co. - An Important Renaissance Revival Gold, Platinum, Opal and Multigem Pendant/Brooch. Composed of two Classical female figures at the shoulders of a central heart shape crystal opal within an engraved and open filigree work surround, containing round demantoid garnets, surmounted with platinum accents set with one old mine cut diamond and 10 old mine cut diamonds, the base suspending an oval pearl. Stamp: T&CO.

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from Lang Antiques

Edwardian Peridot and Diamond Cocktail Ring

Expertly hand-fabricated in platinum, this singular Edwardian treasure glistens and glows with an unusually cut, elongated, asymmetrical oval peridot, weighing 7.45 carats. The luscious lime green gemstone is framed with old mine-cut diamonds supported by a contrasting 18K yellow gold gallery.

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An Art Deco platinum, onyx, coral and diamond brooch, French, circa 1920. A piece of agate inlaid with stripes of coral and onyx, and punctuated with old mine-cut diamonds set within a platinum frame. #ArtDeco #brooch

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from 1stdibs.com

Belle Époque Diamond Pink Enamel Bow Brooch

Belle Époque bow brooch, designed in pink enamel with old mine and rose-cut diamond accents, in platinum and 18k yellow gold, the back with elegant foliate patterned engraving in yellow gold, made in France, circa 1910.

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Platinum, Gold, Sapphire and Diamond Brooch. Centering an oval-shaped sapphire, set with old European, old mine, and single-cut diamonds.

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The extremely rare and valuable Platinum Ore... oooo... if I could only get my hands on but one (even though it takes 10,000 lbs to make smelt a single ounce of raw Platinum)!

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