How can I tell if a vase is hand blown?

The best way to tell if you have a hand-blown glass vase is to locate the pontil mark. The pontil mark is a scar commonly found on the bottom of the piece where the pontil was broken off of the vase. An absence of this scar may indicate your vase was mold-blown. Shop a collection of vintage and contemporary blown glass vases from some of the world’s top sellers on 1stDibs.