His conclusion is based on the fact these objects contain more than 1% Arsenic, while no Arsenical alloying has been found in any other Chalcolithic artifacts.
Nevertheless some of these beads are already found in chalcolithic contexts (site of La Pastora) which has brought some to speculate on an earlier date for the introduction of this material in southeast Iberia (late 3rd millennium BC).
Lempa, Cyprus, village near Paphos District capital on island's southwestern coast; sometimes written as Lemba; located on top of escarpment overlooking Mediterranean Sea in one of Cyprus' most fertile as well as ancient regions; settled in Chalcolithic Period (c. 3800–2500 BC); since 1976 has been site of ongoing archaeological excavations
The three halls contain artifacts from the lower, middle, and upper Paleolithic, as well as the Neolithic, Chalcolithic, early and late Bronze Age, and Iron Ages I-III, through the Median, Achaemenid, Seleucid, Parthian, and Sassanid periods.
Objects in Room I derive from an extensive area around Polis and are chronologically arranged, so as to portray its historical development from the Neolithic and Chalcolithic to the Medieval periods.
The Mesopotamian civilization emerged during the period 3700–2900 BC amid the development of technological innovations such as the plough, sailing boats and copper metal working.
According to the recent excavations made at the archaeological site of Wari-Bateshwar, it can be said that the history of science and technology in Bangladesh starts in the Chalcolithic age, some evidences of pit-dwelling from that period were found in those excavations.