An aquamarine and diamond dress ring, by Dior The large oval-cut aquamarine within an openwork foliate mount pavé-set with brilliant-cut diamonds, aquamarine approx 54.00 carats, diamonds approx 2.00 carats total, signed Dior, numbered, French assay marks, fitted case by Dior.
This is the Chalk Emerald, a 37.8 carat emerald from Columbia. Columbia is the major source of emeralds. It is nestled in a cluster of 60 pear-shaped diamonds weighing a total of 15 carats. It is housed at the Smithsonian Institute.