Black satin evening gown with gold belt

I lost my black satin evening gown yesterday around 6pm near the Chillicothe Public Library on Main Street. It's a Calvin Klein floor-length gown, size 6, with delicate gold beadwork along the neckline and a detachable gold belt that has a small star-shaped rhinestone clasp. There's a tiny nick in the left hem from a stumble last week, but otherwise it's in good condition. It means a lot to me—it's a gift from my sister, and I really need it back for an upcoming event.