Midnight blue beaded evening gown, size M

I lost my midnight blue beaded evening gown yesterday around 3pm after the charity auction outside the Seattle Convention Center near Pike Place Market. It's a floor-length Elara Couture gown, size M, with gunmetal beadwork along the neckline and a small slit at the back. There's a detachable clear crystal brooch on the left shoulder and a tiny constellation embroidery on the inner lining that peeks out when you lift the fabric. I wore it with black heels; the gown still looks great but it's a bit worn in places. It has sentimental value—it's a gift from my late aunt—and I really need it back.