Silver heart pendant necklace, 18-inch chain

I lost my silver pendant necklace yesterday around 3pm near the Biloxi Lighthouse on Beach Boulevard. It's an 18-inch sterling silver chain with a small heart pendant that has a tiny sapphire and a moon engraving on the back. The lobster clasp is stamped 'AM' and the chain shows a bit of wear from daily use. This necklace was a gift from my grandmother and it means a lot to me, so I’d really like it back. If anyone found it, please message me here—I’m hoping to meet up near the Biloxi Boardwalk or downtown Biloxi to pick it up.