Rose gold necklace with heart pendant and MK initials

I lost my rose gold necklace yesterday around 3pm near Fountain Square in downtown Cincinnati, mostly on Vine Street by City Hall. It's a delicate 18-inch chain with a small heart pendant about 1 cm across. On the back, the initials MK are engraved, and there's a tiny blue enamel star charm attached near the clasp. The necklace has sentimental value—it's a gift from my mom, something I wore every day. If anyone found it, I'd really appreciate getting it back; I'm hoping it's just dropped somewhere safe and someone who picked it up can return it.