A Chalcolithic Cup, Ancient Pottery. 4000 BC.
Size: height= 6, width= 9, diameter= 8 cm. Height= 2.3, width= 3.5, diameter= 3.1 inch.
The chalcolithic period is an archaeological period which researchers usually regard as part of the broader Neolithic (although scholars originally defined it as a transition between the Neolithic and the Bronze Age). In the context of Eastern Europe, archaeologists often prefer the term "Eneolithic" to "Chalcolithic" or other alternatives.
In the Chalcolithic period, copper predominated in metalworking technology. Hence it was the period before it was discovered that adding tin to copper formed bronze (a harder and stronger metal). The archaeological site of Belovode, on Rudnik Mountain in Serbia, has the oldest securely-dated evidence of copper smelting, from 7000 BP (c. 5000 BC).
The Copper Age in the Ancient Near East began in the late 5th millennium BC and lasted for about a millennium before it gave rise to the Early Bronze Age. The transition from the European Copper Age to Bronze Age Europe occurs about the same time, between the late 5th and the late 3rd millennia BC.