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And they recovered decorative beads made from copper and galena that likely originated in central North America.

Traces of the mineral galena - lead sulphide - a substance that was crushed and mixed with oil as make-up, was found on the site, archaeologists said.

Hall said the increase stemmed from a greater concentration of the mineral galena in the mined rock.

This corresponds to the spread of Phoenician traders and settlers from their home cities in the Levant into the western Mediterranean, and the consequent exploitation of galena mines in Iberia.

The bill would make limestone the state rock, galena the state mineral and jelinite the state gemstone.