Lost gold heart-shaped pendant necklace with delicate chain near downtown park in Northeast SD.

I lost a beautiful gold heart-shaped pendant necklace while walking in the park near downtown in Northeast SD. I last remember having it on during my walk on Tuesday afternoon. It has a delicate chain and the pendant is fairly small, but it holds sentimental value to me because it was a gift from my grandmother. If anyone finds it, I would greatly appreciate getting it back!