Honest Opinion?

DH's mother died three years ago December.  She was not one to wear a lot of jewelry and a lot of her pieces were in a drawer in the basement.  After she had passed, my SIL and niece went through it and picked out the pieces we wanted.  The broken (beyond repair) pieces we trashed and the rest we donated.  One of the pieces she had was a sterling silver necklace with a picture on it.  It's hard to describe, but it almost resembles a bottle-cap.  The outer piece has a picture of DH and his brother on it from when they were very little.  DH's dad gave this piece to her as a gift.  I love it, personally...but it would be weird to me to wear a necklace with a picture of my husband and brother in law as children.  Would it be bad of me to have the photo replaced to my daughter?  I would love to wear this piece and the fact that it was my MILs means a lot to me.  I just don't want to ruin the sentimental value of it if I remove the picture (if that's wrong, I mean).  What's your honest opinion about this?