Silver bracelet with pine-tree charm

Yesterday around 3pm I lost my silver bracelet in downtown Portland, Maine, near the Portland Public Library on Congress Street. It's a slender sterling-silver chain about 7 inches long with a tiny pine-tree charm and a small blue enamel bead near the clasp. The charm has delicate etching and the bead carries a pale speckle from wear. The bracelet also has a tiny tag engraved 'M.G.' on the clasp. It was a gift from my grandmother and means a lot to me, so I’d be grateful to get it back.