Since she was a Danish royal bride and descendant of Queen Ingrid, she wore the Danish wedding tiara: the Khedive of Egypt Cartier Tiara. Description from pinterest.com. I searched for this on bing.com/images
Emerald Parure Tiara - (Greece) The Emerald Parure Tiara was first worn by Queen Elisabeth of Greece. The emeralds came from Russia to Greece in 1867 when Grand Duchess Olga Constantinova married King George I. The tiara was created by Queen Elisabeth of Greece, who changed the design overtime. The tiara originally started out as a bandeau style then a new one was designed by Cartier in the kokoshnik style. The current tiara features E’s that interlock.