Sterling silver heart pendant necklace

I lost my sterling silver heart pendant necklace yesterday around 3pm. It's an 18-inch chain with a small heart pendant that has a tiny sapphire in the center, and the back is engraved with the initials AK. I think I last had it near the Provo Library on Center Street, after I stopped at the Starbucks on University Ave and headed toward the library steps. This Necklaces & Chains piece was a gift from my grandmother and means a lot to me; I'd be really grateful to have it back if someone found it.