Great point!
Especially all abo. But don't consider it "Man made" material. Glass is melted silica. Like obsidian, minus the other minerals. Silica is basically sand. Sand is small rocks.
Rocks are melted silica and other minerals, soooo........ " Whatcha got there is a gen u wine piece of prehistoric material, which you have lovingly, skillfully, and in traditional fashion, fashioned a gen u wine replicated arrow head, our ancestors would have used in a heart beat, and been proud to show it!
Wayne