Platinum, Ruby and Diamond Ring, J.E. Caldwell - photo Sotheby's

Centered by an octagonal-shaped ruby weighing 3.96 carats, flanked by six calibré-cut rubies weighing approximately .60 carat and two French-cut diamonds weighing approximately .40 carat, size 6¼, signed JEC & Co., circa 1950. With signed box. Estimation: 150,000 - 200,000 USD

Accompanied by AGL report no. CS 46483 stating that the ruby is of Burmese origin, with no indications of heating.

Sotheby's. Important Jewels. New York | 07 févr. 2013 http://www.sothebys.com