Silver pendant necklace with heart charm

I lost my silver pendant necklace yesterday around 3pm near the BYU Bookstore on University Avenue in Provo. It's a small sterling silver heart pendant on a 16-inch delicate chain, with a tiny sapphire inset and the back engraved with 'A.K.'. The chain shows a little tarnish, and the spring ring clasp can be a bit stiff, but it's still secure. This piece was a gift from my mom and it's really sentimental to me, so I’d be grateful to get it back if anyone finds it.