Black Adrianna Papell satin gown, crystal belt

I lost my black Adrianna Papell satin evening gown yesterday evening after the charity gala at the Amarillo Civic Center. It's a size M, floor-length with a plunging V-neck, and it comes with a detachable crystal belt; one crystal on the belt buckle is loose but still attached. There's a tiny coffee stain on the inside lining near the zipper, plus a faint snag along the left hem from stepping off a curb by Market Street near the Civic Center. This dress was a gift from my sister, and I am really hoping to get it back—it means a lot to me. If anyone found it, I would be grateful to be reunited with it.