A large quartz and diamond Art Deco style enhancer, double corner claw set with an emerald cut smoky quartz of approx. 156cts, on a 4 bar and cluster surmount set with 34 round brilliant cut diamonds totalling approx. 1.1ct, in 18ct white gold on a 3 row plaited cord collar with a 9ct gold parrot clasp, size 51 x 30 mm, wt. 54.36g.