The Daily Diadem: Princess Anne's Birthday Portrait Tiara

Image licensed to The Court Jeweller; do not reproduce

Princess Anne of the United Kingdom (now Princess Royal) wears a diamond scroll tiara in a portrait taken to mark her twenty-first birthday, August 1971; the tiara, which Anne has not worn again in public, may have been borrowed for the occasion

Princess Anne's Modern Pearl Earrings

Anne wears the earrings for a national service of thanksgiving for the 90th birthday of Britain's Queen Elizabeth II at St Paul's Cathedral, 10 June 2016 (JUSTIN TALLIS/AFP/Getty Images)

The Princess Royal celebrates her birthday today, and in her honor, we're spending our morning with pieces from her jewelry box that have stood the test of time: her modern pearl, gold, and diamond earrings.

The Daily Diadem: Princess Andrew's Meander Tiara

Terry Disney/Daily Express/Hulton Archive/Getty Images

Princess Anne of the United Kingdom (now Princess Royal) wears Princess Andrew's Meander Tiara at the British Embassy in Vienna during a state visit to Austria, 9 May 1969; read more about the tiara's story here!

Queen Anne-Marie's Modern Emerald Jewels

Sean Gallup/Getty Images

When you think of emeralds worn by the last Queen of the Hellenes, Anne-Marie of Denmark, your mind will almost certainly head straight for the grand emerald parure that belongs to the Greek royal family. But Anne-Marie's collection also includes other emerald jewels, including the modern set of ruby and emerald jewels we're looking at today.

The Daily Diadem: The Cartier Halo Tiara

AFP/Getty Images

Princess Anne of the United Kingdom (now Princess Royal) wears the Cartier Halo Tiara at the State Opening of Parliament, 31 October 1967; read more about the tiara over here!