Gold, diamond, turquoise and enamel 'caduceus' brooch, Carlo and Arthur Giuliano, circa 1895

The wand of Mercury set with an oval turquoise cabochon surmounted by a pearl, flanked by a pair of wings tipped in translucent orange-red enamel, completed by numerous old-mine and single-cut diamonds, signed C.&A.G. 

Artists' Jewellery, Pre-Raphaelite to Arts and Crafts, Wartski, London, March 1989, no. 112 and  Asprey, New York, October 1989, no. 25.