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For tonight’s garden party reception at the Orangery in Warsaw, which celebrated the Queen’s birthday, the Duchess of Cambridge reached into her jewelry box for pieces we’ve seen on tour before.

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Kate wore the faux pearl earrings and necklace that she’s worn on previous engagements, including Trooping the Colour in 2016. Her most notable appearance in the jewels came during this spring’s visit to Paris. (See images over here!) We know for sure that the earrings are by Balenciaga, and some have speculated that the necklace may be part of a set.

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Here’s a closer look at the earrings, which are the “Eugenia” style, made of faux pearls and crystals.

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And here’s a good look at the negligee-style necklace.

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For those who are interested, here’s a view of Kate’s entire outfit. Her dress was made by a Polish designer, Gosia Baczynska, who also attended tonight’s party.

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This week’s tour of Poland and Germany by the Duke and Duchess of Cambridge kicked off on Monday morning with an arrival ceremony in Warsaw and several daytime engagements.

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Kate echoed the colors of Poland’s flag by wearing red jewels and accessories with her creamy white ensemble. Many have already asked me if I believe the stones are rubies, but I’d be hesitant to confirm or deny it. The stone in the necklace is pretty large for a ruby — they exist at that size, but they’re rare and expensive. (But hey, this is the future queen we’re talking about, so it’s certainly possible.) Until we get confirmation, I’m just going to say that they’re gemstones in various shades of red, possibly rubies.

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We’ve not seen these pieces before in public. Here’s a closer view of the necklace, which features a single red faceted gemstone set in a cluster of diamonds. The pendant is suspended from a simple silver-toned chain.

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The earrings include a large drop: a red faceted gemstone set in a double cluster of diamonds. The cluster is suspended from a single diamond stud.

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Kate also wore a ring on her right hand, also set with a red gemstone. The gemstone’s setting is done in yellow gold, while the band of the ring is a silvery-white tone with pave-set diamonds.

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She wore her wedding and engagement rings, plus her eternity band, on her left hand.

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What do you think of Kate’s new jewels? I don’t believe these are a matched set, but rather similar pieces worn together as a sort of married demi-parure. Thoughts?

The Cambridges leave Canada following the 2016 royal tour (Stephen Lock – Pool/Getty Images)

William and Kate attend a birthday party for the Queen in New Delhi in 2016 (Mark Large – Pool/Getty Images)

The tour begins when the family arrives in Warsaw, where they’ll be greeted by President Duda and shown around the Presidential Palace. Other daytime engagements include a tour of a business incubator and a visit to a museum dedicated to the Warsaw Rising of 1944. In the evening, they’ll attend a birthday party for the Queen hosted by the British ambassador to Poland.

Kate attends a street party in London in 2016 (ARTHUR EDWARDS/AFP/Getty Images)

The day begins with a visit to the Stutthof Concentration Camp and a meeting with Holocaust survivors. Later in the day, the couple will attend a street party in Gdansk, tour the city’s Shakespeare Theatre, and visit the European Solidarity Centre.

Kate visits The Mix, a charity focused on support services for young people, in 2016 (ALASTAIR GRANT/AFP/Getty Images)

The family arrives at Berlin’s airport, and then the Duke and Duchess have a private meeting with Angela Merkel. In the afternoon, the couple will visit the Brandenburg Gate and tour the city’s Holocaust Museum. After visiting a charity that supports young people, they’ll meet with President Steinmeier at Bellevue Palace. The evening event for the day is another birthday party for the Queen, this time hosted by the British ambassador to Germany.

Kate participates in a dragon boat race in Canada in 2011 (John Stillwell – Pool/Getty Images)

Much of the day will be spent in Heidelberg, which is a sister city of Cambridge. They’ll visit a cancer research center, see the ruins of Heidelburg Castle, meet the city’s mayor, and take part in a rowing competition on the River Neckar. The evening event for Thursday is a creative industries reception.

William and Kate visit the Hayward Tyler factory in Luton in 2016 (CHRIS J RATCLIFFE/AFP/Getty Images)

The final day of the tour takes place in Hamburg, where the couple will visit the Maritime Museum and listen to a performance by the city’s symphony orchestra. They’ll also tour the city’s Airbus campus before heading back to London.