An art deco emerald ring, circa 1920. Photo courtesy Bonhams.

The step-cut emerald, weighing 19.15 carats, between shoulders set with trios of brilliant-cut diamonds, mounted in platinum, French assay mark, ring size K. Estimate £20,000 - 25,000 (€24,000 - 30,000). Unsold

Bonhams. FINE JEWELLERY INCLUDING SELECTED JEWELS FROM THE COLLECTION OF BARBARA TAYLOR BRADFORD. London, New Bond Street. 5 Dec 2013 -www.bonhams.com