Infanta Isabella of Spain, Princess of Asturias [1]

Of all the diadems in royal vaults, the regal tiaras created by Mellerio dits Meller frequently rank as favorites among the tiara lovers of the world. Today’s diamond and pearl tiara, the Mellerio Shell Tiara, is one of the most unique sparklers ever created by the jewelry house.

Made in 1867, the shell tiara was purchased by Queen Isabella II of Spain the following year as a wedding present for her daughter, Infanta Isabella (pictured above). While Mellerio’s headquarters were (and still are) based in Paris, they opened a branch in Madrid in 1850 and subsequently became a favorite with the royals and nobles of nineteenth-century Spain. This particular Mellerio creation features drop pearls and diamonds suspended from a diamond-encrusted frame that is designed to look like a shell. (Others have also noted the tiara’s resemblance to a cresting wave.) The tiara can be worn with or without an additional diamond drop suspended from the center of the tiara’s base.

The younger Isabella, known as “La Chata,” wore the tiara throughout her lifetime. On at least one occasion, she loaned the sparkler to her younger sister, Infanta María de la Paz. Isabella did not have any children, so when she died, she bequeathed the shell tiara to her nephew, King Alfonso XIII. His wife, the British-born Queen Ena, only wore the tiara a few times; she also loaned it at least once to her daughter-in-law, Maria, the Countess of Barcelona.

In 1962, the Spanish royal family gained a new member when the Maria’s son, Juan Carlos, married Princess Sophia of Greece and Denmark. Ena and Juan Carlos’s parents jointly gifted the shell tiara to the the new Spanish princess. Sofia, who changed the spelling of her name upon her marriage, wore the tiara for the first time at her pre-wedding ball in Athens. Since then, the tiara has become one of her most frequently worn pieces (in the photograph above, she wears it at a 2003 state banquet for the Brazilian president), even after her jewelry collection expanded upon her husband’s accession to the Spanish throne.

But Sofia has also continued the tradition of loaning this tiara to other women in the family. Both of her daughters have been depicted wearing the tiara, as has her sister-in-law, Infanta Margarita. More recently, she also loaned the piece to her daughter-in-law, Letizia, the Princess of Asturias. Even though this tiara is Sofia’s personal property, I wouldn’t be surprised if its lengthy family history makes it a prime candidate to remain with future Spanish queens — first Letizia, and eventually her daughter, Infanta Leonor [2].