Topaz demi-parure, Mid 18th Century - Sotheby's.  

Comprising a pendant/brooch and pair of pendent earrings, each of girandole design suspending three detachable drops, set with foil backed mixed-cut topaz, fittings deficient, fitted 18th Century gilt tooled case. Estimate: 4,000 - 6,000 GBP

LITERATURE: Cf: Daniela Mascetti and Amanda Triossi, "Earrings from Antiquity to the Present", Thames and Hudson, 1990, page 51 for a similar example of Portuguese topaz earrings of girandole design, circa 1750.

Sotheby's. Jewels. London | 11 Apr 2013 www.sothebys.com