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Our celebration of King Willem-Alexander’s 50th birthday continues with another flashback to his 40th birthday party. This time we’re looking at the jewels worn by the foreign royals who attended the big birthday bash. (Missed the first two parts? Visit them here and here!)

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Queen Mathilde of the Belgians (then the Duchess of Brabant) wore glittering diamonds with an appropriately orange gown for the evening.

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Her accessories included diamond and pearl earrings and a diamond necklace.

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I believe the sparkling embellishment on her gown is a part of the dress, not a separate brooch.

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Queen Letizia of Spain (then the Princess of Asturias) wore silver and white, accessorizing with diamonds and pearls.

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She wore one of the biggest pairs of statement earrings we’ve ever seen her in: silver earrings with a cross motif, set with pearls.

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On her left arm, she wore her diamond cuff bracelet from Cartier.

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In a rather unusual touch for Letizia, she also wore delicate golden bracelets on her right wrist.

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Letizia’s sister-in-law, Infanta Cristina of Spain, chose whimsical earrings for the party.

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Here’s a better look at the earrings, which look like diamond curliques.

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Crown Princess Mette-Marit of Norway wore neutral colors, as usual.

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But she shook things up a bit with an over-sized pair of stud earrings with a floral motif.

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Haakon and Mette-Marit were accompanied by Crown Princess Victoria of Sweden, who chose minimal jewels for the occasion.

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She wore delicate earrings…

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…and a silver bracelet on her left wrist. She also wore rings on both hands.

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Princess Sarvath of Jordan wore one of her gorgeous saris for the party.

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She finished her outfit with coordinating golden jewelry with pink gemstones.

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Prince Hassan and Princess Sarvath’s daughter, Princess Badiya, also attended the party. She was accompanied by her husband, Khaled Edward Blair.

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She wore a lovely suite of diamond jewels, including a necklace, bracelet, and earrings, for the event.

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The Earl and Countess of Wessex, who have become close to many of the European royals, attended the party. She was expected their second child, Viscount Severn.

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Sophie chose her modern diamond and blue topaz earrings for the event.

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The former royal family of Bulgaria was also represented at the party. Princess Miriam attended with Prince Kardam. (This was about a year before the car accident that led to Kardam’s long illness and death.)

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Miriam kept her jewels simple, wearing only a cocktail ring on her right hand.

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Princess Rosario, pictured here with her husband, Prince Kyril, wore no jewelry, but that’s not a surprise — she almost never wears significant accessories.

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We also got glimpses of a few more royal guests in the group photograph. We can just see a pair of earrings on Marie Astrid of Austria, who is a sister of the Grand Duke of Luxembourg. She’s standing beside her husband, Archduke Carl Christian.

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Hereditary Prince Alois and Hereditary Princess Sophie of Liechtenstein is also visible in the photo, though it’s hard to see if she wore any interesting jewelry pieces. (Hereditary Grand Duke Guillame of Luxembourg is also standing just in front of Alois and Sophie.)