Lost gold heart-shaped locket with a delicate pearl chain near the water at Pictured Rocks, Upper Peninsula.

I lost my gold heart-shaped locket with a delicate pearl chain while hiking at Pictured Rocks in Upper Peninsula. I noticed it was missing shortly after stopping for a break by the water, and I've looked everywhere but couldn’t find it. It holds a lot of sentimental value, as it was a gift from my grandmother.