Queen Astrid of Belgium wears her convertible diamond and emerald tiara in a portrait, ca. 1920s; you can see another view of this convertible necklace, current status sadly unknown, over here!

Queen Astrid of Belgium (with her brother-in-law, Prince Charles) wears the Stockholm Pearl Tiara for a private audience with Pope Pius XI at the Vatican, January 1930; the diamond and pearl tiara, made by Andersson, was Astrid’s wedding gift from the people of Stockholm, and its current whereabouts are not known