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
Queen Anne-Marie of Greece wearing the Khedive of Egypt Tiara for her wedding. When Queen Ingrid of Denmark died, she left the tiara to Anne-Marie, her youngest daughter. Princess Anne-Marie of Denmark became the Queen of Greece when she married her cousin (several times over), King Constantine II. Since she was a Danish royal bride and descendant of Queen Ingrid, she wore the Danish wedding tiara: the Khedive of Egypt Cartier Tiara.
Princess Nathalie of Sayn-Wittgenstein-Berleberg wearing the Khedive of Egypt Tiara at her wedding. The tiara is owned by Queen Anne-Marie of Greece but is worn at the marriage of all the female descendents of Queen Ingrid of Denmark.
Princess Theodora of Greece wearing the Antique Corsage Tiara. Queen Ingrid of Denmark had this tiara made from a devant de corsage, or set of brooches, that she inherited from her grandmother, Queen Victoria of Sweden. The tiara was a gift to Princess Theodora's mother, Queen Anne-Marie of Greece (then Princess of Denmark), from her parents, King Frederick IX and Queen Ingrid of Denmark, on the occasion of her 18th birthday in 1964.