When Crown Princess Mette-Marit gussies up for a white-tie event, she often selects a specific pair of diamond earrings. And no wonder — these petite diamond chandelier ornaments are seriously sparkling and seriously pedigreed.

In 1954, Crown Prince Olav of Norway — who would later reign as King Olav V — was on the hunt for a silver wedding anniversary present for his wife, Crown Princess Märtha. Olav and Märtha, who was a Swedish princess, married on March 21, 1929, in Oslo. He selected these diamond chandelier earrings as her anniversary present, but sadly, Märtha never got to wear them. She died of cancer exactly one month after their anniversary.

Fast forward half a century, and a new crown princess was joining the Norwegian royal family. Olav and Märtha’s son, King Harald V, and his wife, Queen Sonja, needed a wedding present for their new daughter-in-law, Mette-Marit. They decided to give her Crown Princess Märtha’s silver anniversary earrings.

It was a sentimental gift, but also a fitting one: the diamond earrings would finally be worn by a Norwegian crown princess, albeit two generations later. Mette-Marit debuted the earrings at a gala dinner held the night before her wedding in August 2001. She paired them with Queen Maud’s Vifte tiara/necklace.

Since then, the earrings have been a major part of Mette-Marit’s jewelry collection. Above, she wears them with her wedding tiara at the wedding of her sister-in-law, Princess Märtha Louise.

She also wore the earrings with her wedding tiara at another important Scandinavian wedding: the 2004 nuptials of Crown Prince Frederik and Crown Princess Mary of Denmark.

She wore the earrings to commemorate the anniversary of Norway’s independence…

…and on a state visit to the United Kingdom (birthplace of the buyer of the earrings, King Olav).

Mette-Marit has slowly been adding new pairs of lovely earrings to her jewelry box over the years, but for me, these are hard to top!

Happy August, magpies! It’s a new month, which means it’s also time for a new Magpie of the Month here at The Court Jeweller. This month, we’re celebrating the jewels of one of the coolest royal women around: Crown Princess Mette-Marit of Norway. And we’re kicking things off with a look at the earrings she wore this weekend at one of the biggest European society weddings of the year: the Borromeo-Casiraghi nuptials.

For the wedding on Saturday in Italy, Mette-Marit wore a bohemian floral dress that was made a bit less twee courtesy black accents at the collar and waist. Mette-Marit made the entire look even edgier — perfect for a princess who, after all, met her prince at a rock concert — by adding additional black accessories, including a black headband and a pair of dark, dangling earrings.

The earrings aren’t a new addition to Mette-Marit’s jewel box. She’s been wearing them for almost a decade. Above, she pairs them with a dark fur and a neutral-colored gown for the 70th birthday celebrations for her father-in-law, King Harald V of Norway, in 2007.

The long earrings have three distinct sections. I’m not sure who the designer is, but to me, these look to be diamonds or a similar pale gemstone set in a dark metal, perhaps oxidized white gold.

Mette-Marit also wore the earrings with a navy blue lace dress for the Nobel Prize concert in 2012.

What do you think: would you wear Mette-Marit’s dark pendant earrings?