The value of the ore by ”perfect concentration” is calculated by setting up perfect concentrates liquidating these according to the same smelter schedules and with the same metal prices and reducing the results to the value per ton of crude ore. A simple example follows: The value per ton of crude ore is then $10 for lead concentrate and ...
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Molybdenum had a value of approximately $30000 per tonne as of August 2009. It maintained a price at or near $10000 per tonne from 1997 through 2003 and reached a peak of $103000 per tonne in June 2005. In 2008 the London Metal Exchange announced that molybdenum would be traded as a commodity. History of molybdenum mining
The price of copper has historically been unstable and its price increased from the 60-year low of US$0.60/lb US$1.32/kg in June 1999 to $3.75 per pound $8.27/kg in May 2006. It dropped to $2.40/lb $5.29/kg in February 2007 then rebounded to $3.50/lb $7.71/kg in April 2007.