I strongly suspect you will find the ship depicted on the shard is "Old Ironsides," the Frigate Constitution. During the period 1830-33, following the publication of the Oliver Wendell Holmes poem, the Constitution was a very popular subject for glass manufacturers here in the states. I know there were a quite a number of items produced with that motif, including cup plates, bowls and boxes. Knowing the size and shape (curvature or side view) of the shard would be helpful.
Paul ADK