Silver-tone necklace with heart pendant

I lost my silver-tone necklace yesterday around 3pm outside the Palace Theatre on Clinton Ave in Albany. It's an 18-inch sterling silver chain with a small heart pendant that has a tiny blue sapphire set in the corner. The pendant is stamped '925' on the back, and the lobster clasp is engraved with the initials 'AP'. I wear it every day, and it was a gift from my grandmother, so it really has sentimental value. If anyone happened to pick it up, I’d be so grateful to get it back—my day would be made.