The base metals prices on the London Metal Exchange (LME) were mostly lower on Tuesday with the growing likelihood that Greece will default on its debts and exit from the eurozone.
European leaders warned Greeks that Sunday's vote on the country's international bailout was a referendum on its membership of the eurozone, insisting rejection could have disastrous economic consequences.
In the metals, the three-month unofficial copper price dropped 55 U.S. dollars, or 0.95 percent, to 5,726 dollars per tonne.
Nickel dropped to the lowest since April 2009 below 11,000 dollars a tonne, but recovered its lost at the end. The three-month unofficial nickel price was up 85 U.S. dollars, or 0.72 percent, to 11,925 dollars a tonne.
In other metals, the three-month unofficial aluminium price lost 8.25 dollars, or 0.49 percent, to 1,689 dollars a tonne. The three-month unofficial lead price lost 17 dollars, or 0.96 percent, to 1,757 dollars a tonne.
The three-month unofficial zinc price lost 25 dollars, or 1.24 percent, to 1,991 dollars a tonne. The three-month unofficial tin price lost 512.5 dollars, or 3.54 percent, to 13,962.5 dollars a tonne.