Gold-tone necklace with heart charm

I lost my gold-tone necklace yesterday around 3pm near the Iowa City Public Library on Kirkwood Ave. It’s an 18-inch delicate chain with a small heart pendant that has a tiny emerald bead set in the center, and the back is engraved with the initial 'A'. The chain shows a bit of tarnish and the clasp feels a tad stiff, but the pendant is still bright and in good shape. It was a gift from my grandmother, so it means a lot to me and I’m really hoping it turns up soon.