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Meghan Markle's unique accessory is a sweet tribute to her children

The necklaces she wore have a very special meaning.
Meghan, Duchess of Sussex attends the WellChild awards at the Royal Lancaster
Max Mumby/Indigo / Contributor / Getty Images

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On Wednesday, Meghan Markle celebrated her 40th birthday. For it, she released a video for her "40x40" initiative, a campaign in which she is asking women to pledge 40 minutes of their time to "support women re-entering the workforce," through mentorship, according to the Archewell website.

However, even during her birthday video, the Duchess of Sussex still managed to celebrate her kids with a sweet and subtle tribute.

In the video, Meghan can be seen wearing two gold necklaces in the shape of two very special constellations. The constellations — Taurus and Gemini — are the astrological signs of her 2-year-old son, Archie, and her 2-month-old daughter, Lilibet, respectively.

The star-inspired pieces Meghan wore from Logan Hollowell, a sustainable, Los Angeles-based jewelry brand, are adorned with diamonds in a gold setting.

Though Meghan is no stranger to using her jewelry to share sentimental messages, particularly with the zodiac. Last year, Meghan was spotted wearing a pair of necklaces featuring the Virgo and Taurus star signs for Harry and Archie, respectively.

Personalized necklaces have been gaining traction recently, among celebs and other royals. (Last year, Catherine, Duchess of Cambridge, wore a pendant with "GCL" engraved on it, which are the initials of her three children, Prince George, Princess Charlotte and Prince Louis.)

Constellation necklaces are the perfect way to get in on the personalized jewelry trend, but with a cosmic twist. Below we rounded up the best constellation necklace options that will add a touch of flair — and sentimentality — to any look.

Logan Hollowell Constellation Necklace

The Los Angeles-based brand makes constellation necklaces from 14K gold and diamond or white sapphire stones. The adjustable chain can be worn at two different lengths and comes in gold, silver or rose gold. You can shop the entire constellation collection here.

Potion Number 9 Constellation Necklace

Etsy store Potion Number 9 makes dainty gold-filled constellation necklaces from cubic zirconia stones in a range of lengths. This top-rated accessory is an "Etsy's Pick," meaning it's been selected by style and trend editors as a style to note.

MC Collective Cubic Zirconia Constellation Necklace

This necklace from MC Collective features constellations using cubic zirconia stones. It is available in both gold and silver tones to match your preferred style.

Pottery Barn Teen Nova Constellation Necklace

You can shop this necklace from Pottery Barn in a high polish finish for all of the signs. It features cubic zirconia stones and is gold-plated.

MustHave Zodiac Necklace

This smaller necklace comes with its own astrological card, which breaks down the meaning behind the sign you choose. It has over 200 verified five-star reviews from shoppers that love the dainty look.

Pavoi Constellation Necklace

The brand behind our favorite huggie earrings is also in on the constellation trend. The constellation necklaces are available in rose, white and yellow gold designs and are nickel-free and hypoallergenic. The necklaces have amassed over 1,400 verified-five star reviews from shoppers raving about the quality and "super cute" design.

Espere Zodiac Necklace

Available in sterling silver, this zodiac necklace is another cute option to consider. It is also hypoallergenic, making it perfect for sensitive skin.

Sterling Forever 'When Stars Align' Constellation Necklace

Available in gold- or brass-plated styles, this top-rated pick is perfect to sport your or your loved one's sign.

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