Two diamond tree brooches by Hemmerle, circa 1965. Photo: Sotheby’s.

The larger tree decorated with 18 round and fancy-shaped diamonds, several stones of yellow and brown hue, weighing a total of 16.24 carats, the branches and trunk pavé-set with 83 round brown diamonds weighing a total of 4.20 carats, the smaller tree decorated with 15 round and fancy-shaped diamonds weighing 9.23 carats, the trunk pavé-set with 91 small round gray diamonds weighing 2.15 carats, both mounted in 18 karat white gold, signed Hemmerle. 

The branches of the present tree brooches were originally created by Hemmerle to accomodate a collection of colored diamonds; the current stones were not part of the original design. 

Sotheby's. Magnificent Jewels. New York | 04 Dec 2007. http://www.sothebys.com