Why is she still wearing the necklace I gave her?

I gave my previous girlfriend a necklace, we broke up (she still knows I love her) and on her IG she still is wearing the necklace but she took off the pendant I had on there originally & put a ring on it instead. What do you think this means? (I have spoken to her in almost 3 months by the way)
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Something I want to add is she specifically knows the meaning of the necklace is attached to the both of us being together. It’s something she verbally spoke about with me.
Why is she still wearing the necklace I gave her?
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