A tanzanite and diamond ring. Photo Bonhams.

set with a square step-cut tanzanite, with pavé-set diamond surround, gallery and shoulders; tanzanite weighing approximately: 23.60 carats; estimated total diamond weight: 2.00 carats; mounted in eighteen karat white gold; size 9 1/4 (with hinged hoop). Sold for US$ 25,000 (€18,112)

Bonhams. FINE JEWELLERY. New York, 9 Apr 2014 - www.bonhams.com