This Week in Royal Jewels: April 15-21

10. On Saturday, the Countess of Wessex wore simple earrings, a pendant necklace, and a Girlguiding pin to open the organization’s new headquarters in London.

Photo: Carlos Alvarez/Getty Images

9. In Spain, Queen Letizia wore her diamond wedding earrings to present a literature award on Tuesday.

Photo: MOLLY RILEY/AFP/Getty Images

8. Queen Rania of Jordan wore glittering drop earrings, a pendant with a pyramid-shaped stone, and a sparkling ring on Friday to speak at an IMF and World Bank meeting in Washington, D.C.

Photo: Pelle T Nilsson – Pool/Getty Images

7. At Thursday’s cabinet meeting, Crown Princess Victoria of Sweden wore statement earrings as her King Carl XVI Gustaf announced the name of the family’s newest member: HRH Prince Alexander Erik Hubertus Bertil of Sweden, Duke of Södermanland.

Photo: VALERY HACHE/AFP/Getty Images

6. Princess Charlene of Monaco absolutely glittered in a gorgeous pair of earrings on Sunday at a tennis tournament in Monte Carlo.

5. Queen Maxima of the Netherlands attended the Four Freedoms Awards in Middelburg on Thursday; she wore her drop earrings with embellished orange pendant drops.

Photo: Daniel Leal Olivas – Pool/Getty Images

4. Gold jewelry was on the menu for Queen Sofia of Spain as she attended a dinner in London honoring the centenary of the British-Spanish Society on Wednesday.

Photo: Arthur Edwards – WPA Pool/Getty Images

3. On the day before her 90th birthday, Queen Elizabeth II of the United Kingdom wore a brooch of diamond roses for engagements in Windsor.

2. Princess Beatrix of the Netherlands, wearing diamonds, rubies, and pearls, also attended the Four Freedoms Awards on Thursday. Her brooch is the diamond and ruby bow brooch commissioned by Queen Emma.

Photo: John Stillwell – WPA Pool/Getty Images

1. My star of the week goes to a starry piece of jewelry: the Jardine Star Brooch, worn by Queen Elizabeth II in Windsor on her 90th birthday.