Silver hoops with emerald teardrop charm

Found a pair of earrings this afternoon around 4:15pm by the Market Square fountain in downtown Pittsburgh, near the entrance to the PPG Place complex on Market Street. They're silver-tone hoops, about 1.5 cm in diameter, with a small emerald teardrop charm dangling from one hoop. One hoop has a tiny scratch near the clasp, and the inside back of the earring has a tiny engraving 'M.R.'. I picked them up from the sidewalk by the seating area and figured someone might be missing them after a quick stop at the nearby coffee shop on Wood Street; if these belong to you, I can set them aside for pickup in Market Square.