A fine topaz and diamond pendant, possibly Portugal, 18th century, of girandole design

A fine topaz and diamond pendant, possibly Portugal, 18th century, of girandole design, composed of a circular openwork cluster above a floral spray, suspending three detachable pear-shaped pendants, set with circular-cut, calibré-cut, cushion- and pear-shaped topaz and rose-cut diamonds, in foiled closed-back settings, mounted in silver, length 7cm

Cf.: a page of comparable girandole designs with floral elements in JH Pouget, Traité des Pierres Précieuses, France, 1762, cited by Diana Scarisbrick in Brilliant Impressions: An Exhibition of Antique Paste and Other Jewellery, SJ Phillips Ltd, 2010, p.26