Lost gold pendant necklace with heart-shaped locket in a park near Mankato.

I lost a gold pendant necklace with a heart-shaped locket while walking my dog in the park near Mankato. It was a gift from my grandmother, and I remember taking it off briefly to apply some hand sanitizer. I think I might have left it on a bench or dropped it in the grass. If anyone finds it, I would be incredibly grateful for its return!