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In March, actress Charlize Theron announced she adopted a baby boy, and now she wears a little yellow gold “J” initial in honor of his name, Jackson. The piece is by Dalla Nonna Jewelry and available for $225 at dallanonnajewelry.com. The same company also makes calendar charm necklaces (available in rose, white and yellow gold or sterling silver) with a sapphire over the day you want to celebrate for a unique way to hold a date close to your heart. See more moms with kid-inspired jewelry in the gallery.

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