Emerald green Adrianna Papell gown, sentimental

I lost yesterday around 6pm outside the Seaside Promenade on Broadway Street, Seaside, Oregon. It's an emerald green satin gown by Adrianna Papell, size 6, floor-length with a silver beaded belt. The back zipper has a small seashell charm attached and there's a tiny snag near the hem from brushing a curb; otherwise it's in excellent condition. It has sentimental value — it was a gift from my grandmother for my sister's coastal wedding, and I really need it back.