What is known about the history of glass is that glassblowing was actually invented in Palestine in the early years of the Roman Empire. The glass was made from river sand, which was really rich in minerals. There are archaeological excavations that prove that the early production of raw glass used for blowing originates in the vicinity of the city of Akka. Some of these techniques still exist today, for example, the architecture of the glass furnace has not changed much since the Roman Empire, and you can still find the same furnace in Hebron.