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As we’ve marveled our way through the jewelry box of Queen Anne-Marie this month, I’ve had lots of questions about one piece in particular: her diamond cross pendant.

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Anne-Marie, who was born a Danish princess, famously wore the cross on the day she married King Constantine II of Greece in September 1964. The diamond ornament was a gift to the eighteen-year-old princess from her parents, King Frederik IX and Queen Ingrid of Denmark.

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Here’s a closer look at the substantial pendant. Note two things in particular: the size of the yellow gold loop at the top of the cross, which allows the pendant to be worn with larger necklaces (including pearls), and the marquise-shaped adornment on that loop, which is also set with diamonds.

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Anne-Marie’s time as Greece’s queen consort was short, lasting less than a decade. During that time, she wore the pendant for important gala occasions, including her royal wedding. But she also used it for formal daytime events, like the Greek royal audience with Pope Paul VI at the Vatican in April 1966. On that occasion, she wore the pendant with Queen Alexandrine’s Diamond Necklace and the Antique Corsage Tiara, both also jewels she received from her Danish family.

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Today, the cross pendant still resides in Anne-Marie’s jewelry box. She doesn’t wear it often, but it does make occasional appearances. One of the more prominent recent outings for the pendant came in 2010, when her second son, Prince Nikolaos, married Tatiana Blatnik on the Greek island of Spetses.

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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.

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As is the case with many families that have lost their royal thrones, the information available about the Greek royal jewels is a bit murky. (They are essentially private citizens now, after all, and all the jewelry they continue to wear is theoretically personally owned.) Over the last decade, Queen Anne-Marie has worn an interesting set of jewels featuring emeralds, rubies, diamonds, and pearls. We don’t appear to know much specific provenance information about them. Above, Anne-Marie wears the brooch in Luxembourg in 2008 for the celebrations of Grand Duke Henri and Grand Duchess Maria Teresa’s silver wedding anniversary.

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Here’s a closer look at the brooch from the set. Ribbons of diamonds and emeralds wrap around a central element set with a large cabochon emerald, studded at the edges with four rubies. A single pear-shaped pearl drop is suspended from the bottom of the brooch. To me, the construction of the jewel suggests that it is a newer piece.

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This suspicion is also bolstered by the earrings from the set. Anne-Marie wore both the brooch and earrings together in 2012 for a major royal occasion: the wedding of Hereditary Grand Duke Guillaume of Luxembourg.

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Here’s a closer view of the earrings, which also feature emeralds and diamonds in a modern setting, plus pendant pearl drops.

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The innovative setting of the jewels, plus the traditional addition of the pearl drops, make this set an interesting choice for a former queen — a woman whose life has spanned a tumultuous period of upheaval and exile.

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!