Gold-tone heart pendant necklace, 18-inch chain

I lost my gold-tone heart pendant necklace yesterday around 3pm outside the Atlantis Casino on Virginia Street in Reno. It's an 18-inch gold-tone chain with a small heart pendant that has a tiny scratch on the front and a slightly loose clasp; the back is engraved with the initial 'M'. I bought it last year from a local shop, but it's really sentimental—my grandmother gave it to me. If anyone found it, please reach out; I'm really hoping to get it back.