Vintage hexagon diamond and calibre emerald engagement ring in an Art Deco influenced design. Circa 1940, from Doyle & Doyle.

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3.26 carat antique diamond engagement ring. Late Edwardian or early Art Deco. Via Diamonds in the Library.

Art Deco emerald and diamond earrings by Cartier, circa 1935. Each earring is hung with a polished emerald within an open diamond-set frame. The frames are each divided by a line of baguette diamonds and with fancy kite shaped diamond, from diamond set circle-and-dot tops, millegrain set. Via Diamonds in the Library.