Navy satin evening gown with pearl embellishments

I lost my Elara Couture navy satin evening gown, size M, floor-length, with a pearl-embellished neckline and a small tear at the hem. It has a hidden zipper pocket in the lining that held a delicate crystal pendant—one of a kind. It was a gift from my grandmother and means a lot to me; I wore it to the charity gala yesterday evening. I think I misplaced it outside the Ocean Center on North Atlantic Avenue near the Bandshell around 9pm, after the event. If anyone found it, please reach out; I would be really grateful to have it back.