This documentary is about European and Arab Caucasians from the Ice Age to the first civilizations.  It gives a good commentary on our Caucasian history.  It shows how Caucasian people used copper (which is green rock found in layers) to make jewelry and eventually, they developed bronze by melting together, copper and 12% tin,  often with the addition of other metals such as aluminum, manganese, nickel or zinc. 

Documentary Synopsis:

An exploration of the revolutionary period of prehistory that began when humans abandoned the nomadic hunting and gathering existence which they had known for millennia. This abandonment gave them a completely new way of life for a decisive move to herding, then to farming with permanent settlements and finally setting the stage for the arrival of civilization.