Two tiaras with diamond blooms are paired up in this contest!

This detailed diamond floral tiara originally belonged to Princess Dagmar of Denmark, a sister of King Christian X (and King Haakon VII of Norway). The tiara was later passed on to Queen Margrethe II, who offered it as a long-term loan to her daughter-in-law, Princess Marie, in 2008. Since then, it has been Marie’s primary tiara, worn for all sorts of gala occasions.

This all-diamond tiara features one of the most important symbols of the Japanese imperial family: the chrysanthemum flower. The piece was a favorite of Michiko’s mother-in-law, Empress Nagako, who wore it on Akihito and Michiko’s wedding day in 1959. Michiko has often chosen this piece for banquets. She also wore the tiara on the wedding day of her younger son, Crown Prince Fumihito, in 1990.

Will it be the Danish rubies or the Belgian diamonds?

This tiara began its life as a series of hair combs, purchased by Jean-Baptiste Bernadotte for his wife, Desiree, to wear at Napoleon’s coronation in 1804. When Bernadotte was elected King of Sweden, the rubies became royal jewels. The combs were made into a bandeau by Queen Alexandrine of Denmark, who had received them from her mother-in-law, Lovisa of Sweden. Queen Ingrid turned the bandeau into a grand wreath tiara, which is now worn by Crown Princess Mary of Denmark.

This antique diamond laurel wreath tiara, made in England in 1912, was given to Queen Mathilde of the Belgians by a group of aristocrats as a wedding present in 1999. She has worn the lovely convertible jewel often over the last two decades, both as a tiara and a necklace.

It’s time for the first sparkling tiara contest of round three!

This Spanish tiara has an important pedigree: it was a gift from King Alfonso XII to his wife, Queen Maria Cristina. The sparkler was sold when the family went into exile in the ’30s, but it was later bought back by Franco and given as a wedding present to Queen Sofia. Today, the classic diamond floral tiara is one of Queen Letizia’s signature pieces.

Some believe that this incredible, flexible floral ornament originally belonged to Grand Duchess Anastasia Mikhailovna of Russia, grandmother of King Frederik IX. We know for sure, though, that in the 1960s it belonged to a famous Danish-American tenor, Lauritz Melchior. He sold it to King Frederik in 1963, and it’s been sparkling on the heads of Queen Ingrid and Queen Margrethe II ever since. Queen Margrethe is especially inventive in the ways she wears the three-sectioned tiara.