That's a very brave statement, given that there's currently no clear data for Tin/Tungsten/Tantalum/Gold smelters' ore origins. I've seen the data. Two of the e

That's a very brave statement, given that there's currently no clear data for Tin/Tungsten/Tantalum/Gold smelters' ore origins. I've seen the data. Two of the eleven tantalum smelters on the planet have been audited. The others aren't sure where all their ore comes from. Big problem. Working on solving it.