The Queen's Garter Day Earrings

Queen Elizabeth II and the Duke of Edinburgh attend the Order of the Garter Service, 14 June 2004 (ODD ANDERSEN/AFP/Getty Images)

Get excited, everybody: after last year's hiatus (thanks to the general election), Garter Day festivities return today at Windsor Castle! Although the Queen wears the same attire -- the robes of the Order of the Garter -- every year for the service, the day gives us a chance to see some unusual outings from the Queen's earring collection. Here's a look at the earrings she's worn on the day for the past two decades.

The Daily Diadem: Queen Adelaide's Diamond Fringe Tiara

National Portrait Gallery, London

Queen Mary of the United Kingdom wears Queen Adelaide's diamond fringe on a tiara frame in a portrait taken by Bassano in 1911; learn more about the fringe over here!

Empress Marie Feodorovna's Sapphire Brooch

Queen Elizabeth II opens a new children's park at Pitten Crieff Park in Dunfermline, 1 July 2003 (ANDREW PARSONS/AFP/Getty Images)

One of my favorite things about pearls are their ability to coordinate so seamlessly in jewels featuring colorful gemstone. This lovely, classic brooch from the Queen's collection, Empress Marie Feodorovna's Sapphire Brooch, combines a beautiful sapphire and diamonds with a pearl drop.

The Daily Diadem: Lady Barrington's Tiara

National Portrait Gallery, London

Charlotte Barrington, Viscountess Barrington wears a diamond and pearl tiara in a portrait taken by Bassano at the time of the 1911 coronation; I have no additional information about the jewels depicted here

The Howe Diamond Fringe Tiara

(National Portrait Gallery, London)

I'm an unabashed lover of fringe tiaras, but their simplicity often leads jewelers to join them with other, more elaborate pieces of jewelry to form larger, grander diadems. Today's sparkler, the Howe Diamond Fringe Tiara, is just one of those pieces.