Gold pendant necklace with ruby and initials

I lost my 14k gold pendant necklace yesterday around 3pm near Sunrise Bakery on Main Street in Chautauqua. It's a slim 16-inch chain with a heart-shaped pendant that has a tiny ruby and the initials 'PR' engraved on the back. The chain has a small nick near the clasp and a faint coffee stain from a picnic last month. It was a gift from my grandmother and means a lot to me, so I'd really appreciate getting it back if you found it.