(Dominic Lipinski – WPA Pool /Getty Images)

(ALASTAIR GRANT/AFP/Getty Images)

7. The Nizam of Hyderabad Necklace: This Cartier diamond necklace was one of the Queen’s wedding presents in 1947; Kate borrowed it for an event at the National Portrait Gallery. (More, including great close-ups, over here!)

(Stephen Pond/Getty Images)

6. Queen Mary’s Choker Bracelet: Another loaner from the Queen, this bracelet, which was made from a choker necklace worn by Queen Mary, was also worn by the late Queen Mother. (Closer views over here!)

(Dominic Lipinski – WPA Pool /Getty Images)

5. The Edinburgh Wedding Gift Bracelet: This bracelet is a very sentimental loan from the Queen to Kate; it was her wedding present from the Duke of Edinburgh in 1947. The diamonds on the bracelet were taken from a tiara that belonged to his mother, Princess Andrew. That tiara was her wedding gift from Tsar Nicholas II and Tsarina Alexandra of Russia! (More over here!)

(Dominic Lipinski – WPA Pool /Getty Images)

4. Queen Mary’s Lover’s Knot Tiara: This iconic tiara is another loan from the Queen. Made for Queen Mary, it’s also been worn by the Queen and, more famously, by the late Diana, Princess of Wales. (More over here!)

(BEN STANSALL/AFP/Getty Images)

3. The Sapphire and Diamond Engagement Ring: Made by Garrard, Kate’s famous sapphire and diamond cluster engagement ring originally belonged to her late mother-in-law, Princess Diana. William gave the ring to Kate as a way to include his mother in their engagement and wedding celebrations. (Much more over here!)

(Stephen Pond/Getty Images)

2. The Queen’s Diamond Chandelier Earrings: These delicate, lovely diamond chandelier earrings were one of the Queen’s earliest jewel loans to Kate; she wore them for the first time during a visit to America shortly after the royal wedding. (More over here!)

(Dominic Lipinski – WPA Pool /Getty Images)

1. The Lotus Flower Tiara: My favorite of the three tiaras that Kate has worn so far, this diamond and pearl sparkler originally belonged to the Queen Mother. It was worn for years by Princess Margaret, and it was also the bridal diadem worn by her daughter-in-law, Viscountess Linley (now Countess of Snowdon). Kate’s most prominent appearance in the tiara so far was at the Chinese state banquet in 2015. (More over here!)

(Chris Jackson/Getty Images)

(Jason DeCrow – Pool/Getty Images)

14. The Modern Diamond and Emerald Demi-Parure: Worn for a New York fundraising gala for her alma mater, the University of St Andrews, this elaborate suite of jewels includes a large pair of earrings and a matching bracelet. (More over here!)

(Chris Jackson – WPA Pool /Getty Images)

13. The Sapphire and Diamond Fringe Earrings: This unique pair of sapphire drop earrings, which features a delicate diamond fringe, belonged to the late Queen Mum. (More over here!)

(Chris Jackson – Pool/Getty Images)

12. The Diamond Maple Leaf Brooch: Another jewel from the Queen Mother’s collection, this Asprey diamond brooch has been lent to Kate by the Queen for both of her trips to Canada. (More over here!)

(Chris Jackson/Getty Images)

11. The Diamond and Pearl Earrings: In 2016, Kate began wearing this classic pair of earrings, which feature a pearl drop suspended from a diamond stud. The Queen wore these during her Silver Jubilee, and she’s also loaned them in the past to the Countess of Wessex. (More over here!)

(Eamonn M. McCormack/Getty Images)

10. The Diamond Frame Earrings: Another jewelry loan from the Queen, these diamond earrings feature a floral stud, a diamond pendant, and a diamond frame. Kate began wearing these for evening engagements in 2016. (More over here!)

(Steve Parsons/WPA Pool/Getty Images)

9. The Diamond Wedding Earrings: This pair of earrings, which features an oak leaf stud and an acorn drop, was made by Robinson Pelham to coordinate with Kate’s wedding tiara. They were Kate’s wedding gift from her parents. (More over here!)

(BEN STANSALL/AFP/Getty Images)

8. The Cartier Halo Tiara: Speaking of Kate’s wedding tiara … the Cartier Halo, which originally belonged to the Queen Mother, became an instant classic when Kate wore it on her wedding day in 2011. (More on its history over here!)

(Chris Jackson/Getty Images)

(Chris Jackson/Getty Images)

21. The Collins Tanzanite Suite: This versatile, vivid demi-parure of diamond and tanzanite jewels features a pair of earrings and a pendant necklace. One of its most prominent outings so far came at the beginning of the recent tour of Canada. (See more here!)

(Chris Jackson/Getty Images)

20. The Mouawad Ruby Demi-Parure: Reportedly one of Kate’s wedding gifts, this suite of jewels features a diamond and ruby fringe necklace with floral motifs and a matching bracelet. (More over here!)

(Chris Jackson/Getty Images)

19. The Robinson Pelham Pagoda Earrings: Kate and her mother, Carole, have both worn this pair of diamond and blue topaz earrings. They also have a coordinating necklace, which only Carole has so far worn. (More over here!)

(Chris Jackson/Getty Images)

18. The Diamond and Aquamarine Earrings: These petite white gold, diamond, and aquamarine earrings have become workhorses of Kate’s collection since their debut in Singapore five years ago. (More over here!)

(Chris Jackson/Getty Images)

17. The Diamond Cluster and Baguette Suite: Diamond earrings, a bracelet, and a ring in a distinctive cluster-and-baguette design make up this versatile set, which was reportedly a wedding gift from Prince Charles. (More over here!)

(Jack Taylor/Getty Images)

16. The Bahrain Pearl Earrings: On Remembrance Sunday in November, Kate debuted a pair of earrings borrowed from the Queen. The diamond and pearl earrings were made using pearls given to the Queen as a wedding present by the nation of Bahrain in 1947.

(Phil Noble – WPA Pool/Getty Images, Anthony Devlin – Pool/Getty Images)

15. The Sapphire and Emerald Cluster Earrings: Kate owns two very similar pair of diamond cluster earrings, one with sapphire centers and the other with emeralds. Both have been regular parts of her daytime jewelry rotation since the early years of her marriage. (More on the sapphires over here and the emeralds over here!)