How did the calcolithic age get its name?

The Calcolithic Age, also known as the Copper Age, derives its name from the Greek Words "chalcos," meaning copper, and "lithos," meaning stone. This period is characterized by the use of copper tools and weapons alongside traditional stone tools. It marks a transitional phase between the Neolithic and the Bronze Age, highlighting the innovative use of metal in early human societies. The name reflects the significant technological advancement represented by the introduction of copper Metallurgy.