In December 1955, the engagement between Prince Rainier of Monaco and Grace Kelly was officially announced. He gave her a "temporary" engagement ring of diamonds and rubies while her real engagement ring was being made.Princess Grace's engagement ring was a 10.47 carat emerald-cut diamond set in platinum. She wore it while filming her final movie, "High Society" (1956) with Bing Crosby and Frank Sinatra. (Movie clip coming soon!)
From left to right: The engagement ring; Princess Grace wearing her ring in a publicity portrait for High Society; Princess Grace wearing her "temporary" engagement ring.