ALWAYS WEAR GLOVES WHEN HANDLING ROUGH GLASS!  This piece is perfect of a collector or enthusiast and is so pretty. Slag glass Made in the Pittsburgh area of PA no later than the 1940s, but possibly much older. The specific Pittsburgh Plate Glass Co. plant that these items are from opened in 1887 along the Allegheny River in Ford City, PA. It actually turned the town into a boom town for quite some time. These pieces came from a man who worked in that plant in the 1940s. PPG has an extensive history in the United States. If you buy this piece, you're buying a piece of history. Requests for more photos and questions are always welcome!