Gold-tone necklace with heart pendant, sentimental

I lost my gold-tone necklace yesterday around 3pm. It's a 16-inch chain with a small heart pendant, and there's a tiny initial 'A' engraved on the back. I last saw it outside the Meridian Central Library on Main Street, near the coffee cart, but I wandered around Meridian Park and the Meridian Town Center thinking maybe it slipped off somewhere along Meridian Ave. The chain shows a bit of wear, and the pendant has a small scratch on the edge. It really means a lot to me—it was a gift from my mom, and I’m desperate to get it back.