"Metals are not immediately sellable products â¿¿ there are processes and refining needed to get out the impurities," she said. "So, there are added costs in metals mining that you don't see in other natural resources like timber, gas and coal."
Supporters of royalties such as Grijalva say reform is overdue and multinational mining companies that profit from U.S. public lands should be paying.
"We're not dealing with a grub stake or prospector going out there, but multinational companies that end up exporting most of the minerals they take out," Grijalva said. "And we're getting nothing back for taxpayers to maintain parks, offset the deficit and to clean up abandon mines all over the West."
___Jason Dearen can be reached at â¿¿ http://www.twitter.com/JHDearen