A labradorite, diamond and gold bird brooch, by Sterlé. Photo Christie's Image Ltd 2013 

Designed as a sculpted labradorite bird, with a circular-cut diamond beak and eye, enhanced by circular-cut diamond and textured 18k gold wings and plumage, circa 1960, with French assay marks and maker’s mark. With maker’s mark for Sterlé and Cie. Estimate: $10,000 – $15,000

Christie's. MAGNIFICENT JEWELS. 10 December 2013. New York, Rockefeller Plaza -www.christies.com