An Art Deco Ruby, Emerald and Diamond Brooch, by Janesich. Photo Christie's Image Ltd 2014

Composed of a pavé-set buff-top ruby frame interwoven with a pierced stylised single, old and baguette-cut diamond-set ribbon, to the central kite-shaped diamond 'knot', suspending a single old-cut pear shaped diamond drop, 1920s, 6.4 cm, with French assay marks for platinum and gold, in fitted Janesich case. Estimate: CHF60,000 – CHF75,000 ($68,252 - $85,315) 

Provenance: Sotheby's St Moritz, 17-18 February 1995, lot 318. 

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014. Geneva - www.christies.com