Navy blue Adrianna Papell evening gown with silver belt

I lost my navy blue Adrianna Papell evening gown yesterday around 3pm near the Tucson Mall on Oracle Road. It's a floor-length satin dress, size 6, with a slim silver sequin belt and a small, almost invisible tear at the bottom hem. There’s a detachable crystal-embellished belt that can be worn with it, and the inner lining features a tiny heart embroidery in the upper corner for a personal touch. It was a gift from my grandmother, and I really need it back for an upcoming wedding in a week.