<human>: Can you condense the text into a few key points?

For mother's day this year, my boyfriend presented me with this beautiful jadeite necklace that he said he got when he was in another country years ago.  I really love the necklace, it's original and beautiful.

While going through facebook photos, I ran across a picture of him and his ex and she's wearing the same necklace.  I don't know or have any bad blood with his ex-girlfriends so I'm not really concerned in that area but I find the idea overall cheesy and I'm kind of irritated by it.  Am I overreacting?  Should I bother asking him about it or should I just let it go?
<bot>: Am I overreacting by being irritated that a necklace I received for mother's day was originally an ex-girlfriend's present?