Gold pendant necklace with sapphire heart

Lost my gold pendant necklace yesterday around 3pm near the Princeton Shopping Center on Nassau Street. It's a slender 14k gold chain, about 18 inches, with a tiny sapphire heart pendant and a small, barely visible scratch on the clasp. The back of the pendant has a tiny heirloom engraving that reads 'M.J.'—a two-letter mark I added myself. It means a lot to me; it was a gift from my grandmother, and I’ve worn it every day. If someone happened to find it, I’d be forever grateful to get it back.