All eyes are on Queen Letizia when she steps out in the Mellerio Floral tiara, so it comes as no surprise that the Spanish heirloom is one the royal favours. She dazzled in the adornment on a number of occasions during her decade as the Princess of Asturias and Letizia has remained true to the tiara in the year and a half since her husband King Felipe VI ascended the throne.
The 43-year-old wore the tiara to attend her last gala dinner as a princess, just days before King Juan Carlos I announced that he was stepping down in June 2014.
Letizia also donned the tiara to make her debut as Spain's new queen at an official banquet.
The former journalist has relied on the tiara for state banquets and gala dinners as well as for royal, high-profile events.
She borrowed the floral jewel for Prince Daniel and Princess Victoria of Sweden's wedding in 2010, and again notably wore it at the farewell dinner of Princess Beatrix of the Netherlands before the monarch abdicated in 2013.
The gem in question was created by French jewelry house Mellerio dits Meller in the late 19th century. The beautiful tiara is made of diamonds in the form of flowers, which are interlaced with leaves and delicate petals.
It was actually a wedding gift from General Franco to Queen Sofia – Letizia's mother-in-law – on the occasion of her marriage to King Juan Carlos I, presented on behalf of the Spanish people.
Sofia wore it, perhaps for the first time, at her pre-wedding ball in 1962. The elegant Greek princess chose to don the piece, which is convertible, as a necklace.
While Queen Letizia has taken a shining to the tiara and likes to wear it to formal events, other women of the Spanish royal family have also had the honour of borrowing it.
Sofia and King Juan Carlos's daughter Elena, Duchess of Lugo, wore the tiara many times in her younger years, and her sister Cristina used it as her main accessory on her wedding day in 1997.