Silver chain necklace with crescent pendant

I lost my silver-plated necklace yesterday around 3pm. It's an 18-inch slim chain with a small crescent moon pendant, a tiny sapphire-blue stone at the tip, and faint initials 'PP' engraved on the back. It's unbranded and slightly tarnished from wear, but otherwise intact, and I was by the Beaver Island State Park entrance off Whitehaven Road in Grand Island when I think I dropped it while I was taking photos near the overlook. This necklace means a lot to me — it was a gift from my grandma — and I really need it back; if you find it, please message me here and we can arrange a meetup in Grand Island.