An antique diamond en tremblant floral and foliate spray brooch, circa 1880. Photo Bonhams

accentuated by a baroque-shaped pearl measuring approximately 14.1 x 10.5mm.;mounted in silver-topped gold; length: 4 5/8in. (pearl untested, some small rose-cut diamonds deficient). Estimate: US$2,500 - 3,000 

Bonhams. Salon Jewelry & Watches, 26 Mar 2012. California, San Francisco and California, Los Angeles www.bonhams.com