Anne-Marie wears the brooch at Crown Princess Victoria’s pre-wedding gala in Stockholm, June 2010 (Pascal Le Segretain/Getty Images)

We’re continuing to pilfer through the jewelry box of our Magpie of the Month — Queen Anne-Marie, who was once Queen of the Hellenes — and today, we’ve got a look at her glittering diamond brooch in the shape of a swan.

Little information appears to be available about the brooch’s provenance, but it seems to have some significance for Anne-Marie, as she has worn it for some major events. Above, she wears the swan for the christening of her younger daughter, Princess Theodora, in London in October 1983.

And here, she dons the brooch for the wedding of her eldest son, Crown Prince Pavlos, in July 1995.

Five years later, Anne-Marie wore the brooch with the necklace she inherited from Queen Alexandrine for a gala dinner for the Prince’s Trust in London.

Anne-Marie wears the brooch at Crown Princess Victoria’s pre-wedding gala in Stockholm, June 2010 (Pascal Le Segretain/Getty Images)

In 2010, Anne-Marie brought the brooch with her to Sweden, where she wore it for the pre-wedding concert held in honor of Crown Princess Victoria and Prince Daniel. The bright red dress she wore the brooch against on this occasion really helped to set off the brooch’s details.

Anne-Marie wears the brooch during her sister’s Ruby Jubilee festivities in Copenhagen, January 2012 (Chris Jackson/Getty Images)

Anne-Marie has also innovated with the brooch’s placement, wearing it at her waist for one of the events during the 2012 Ruby Jubilee celebrations of her eldest sister, Queen Margrethe II of Denmark. On this occasion, she paired the brooch with an important Danish diadem: the Khedive of Egypt Tiara.

Anne-Marie wears the brooch at the Sovereigns’ Luncheon during the Diamond Jubilee festivities in Britain, May 2012 (Dominic Lipinski/AFP/Getty Images)

The brooch managed to sparkle against a more neutral color palette when Anne-Marie wore it for the grand Sovereigns’ Luncheon during Queen Elizabeth II’s Diamond Jubilee in 2012.

Anne-Marie wears the brooch at the Sovereigns’ Luncheon during the Diamond Jubilee festivities in Britain, May 2012 (JOHN STILLWELL/AFP/Getty Images)

This profile angle gives you a nice idea of the size and heft of the brooch — and of the extreme sparkliness of its diamonds!

Anne-Marie wears her necklace for the pre-wedding gala in Spain, 21 May 2004 (ODD ANDERSON/AFP/Getty Images)

This August, we’re devoting our Magpie of the Month posts to a woman who celebrates her birthday in a few weeks: Anne-Marie, the Danish princess who was Queen of Greece in her youth. We’re kicking things off with a piece that connects her with her Danish royal heritage: her diamond necklace, made from a sautoir that belonged to Queen Alexandrine.

Anne-Marie wears her necklace at a farewell dinner held at Fredensborg shortly before her wedding, 10 September 1964 (Keystone/Hulton Archive/Getty Images)

Anne-Marie and her sister, Princess Benedikte, own identical diamond necklaces. The pieces were made by dividing up a sautoir — a fashionable long necklace worn in the 1920s and 1930s — that belonged to their Danish grandmother, Queen Alexandrine. The original necklace was always able to be taken apart and worn in different lengths and configurations, so dividing the piece for the young princesses was not a difficult task. Both women began wearing their necklaces in their youth; above, Anne-Marie wears hers a few days after her eighteenth birthday, shortly before she married King Constantine II of the Hellenes.

A portrait of Anne-Marie wearing her necklace with the Greek royal emeralds, displayed on 3 May 1968 (Keystone/Getty Images)

Anne-Marie brought the diamond necklace with her to Athens and used it immediately, often combining it with various pendants, including a substantial cross. In the portrait above, she uses the large brooch from the Greek royal family’s emerald parure as a pendant on the necklace.

Anne-Marie wears her necklace with the Greek royal emeralds at the Danish royal wedding, 14 May 2004 (Sean Gallup/Getty Images)

The necklace followed her into exile, and she’s continued wearing it ever since. Here she wears it with a different configuration of the Greek emeralds for the wedding of her nephew, Crown Prince Frederik of Denmark, in 2004.

Anne-Marie wears her necklace with Margaret of Connaught’s aquamarine pendant at the pre-wedding gala in Luxembourg, 19 October 2012 (Sean Gallup/Getty Images)

The necklace’s simple design and its all-diamond setting allow it to be combined with numerous gemstones. In Luxembourg in 2012, Anne-Marie wore the necklace with a heart-shaped aquamarine pendant that had belonged to her British-born grandmother, Princess Margaret of Connaught. Her tiara on the occasion, the magnificent Khedive of Egypt Tiara, also belonged to Margaret.

Anne-Marie wears her necklace at the wedding of Nathalie of Sayn-Wittgenstein-Berleburg, 18 June 2011 (Andreas Rentz/Getty Images)

Anne-Marie also sometimes wears the necklace sans pendant, and I think it manages to hold its own. (Her topaz brooch here also has a removable pearl pendant; Queen Ingrid inherited it from a German great-aunt. More here!)

Benedikte wears her necklace at the Swedish royal wedding, 8 June 2013 (Pascal Le Segretain/Getty Images)

For the sake of comparison, here’s a look at Princess Benedikte wearing her identical diamond necklace at the wedding of Princess Madeleine of Sweden in 2013. (More on the Star and Pearl Tiara she wore with it can be found here!) Benedikte also often wears her necklace with various pendants from her jewelry box.

Benedikte wears her necklace as a pair of bracelets at a pre-wedding dinner in Copenhagen, 11 May 2004 (Sean Gallup/Getty Images)

Even after being split into two, the necklaces are still able to be worn in different configurations. An example of their continued versatility can be seen here, as Benedikte wears hers divided as a pair of bracelets for a pre-wedding gala in Denmark in 2004.