An amethyst and diamond blackamoor stick pin, Nardi. Photo Bonhams

designed with an amethyst headdress and bodice each detailed with round brilliant-cut diamonds, and accentuated with diamond earrings;signed S. Nardi; mounted in eighteen karat gold; length: 1 1/2in. Sold for US$7,320

Property from the Private Collection of Lauren Bacall

Bonhams. Fine Jewelry, 15 Jun 2011, New York, California, San Francisco and California, Los Angeles www.bonhams.com