Gold pendant necklace with heart charm

I lost my gold pendant necklace yesterday around 3pm outside BookPeople on North Lamar Blvd in Austin. It's a 14k gold chain, about 16 inches long, with a small heart-shaped pendant that has a tiny sapphire in the center. The back is engraved with the initials 'A.J.' and there's a tiny nick along the edge from a drop last week. It’s got sentimental value—it was a gift from my grandmother, and I really need it back. If anyone found it, I’d be incredibly grateful and I’ll absolutely arrange a meetup to get it back.