coltan.
Tin, walframite, tantalite, monozite.
Zircon sand.
Copper cathodes, copper concentrates, malachite copper ore, copper oxyde, cobalt ore, manganese ore.Product information, market information, contract negotiations, drafting and authorisation
Manganese ores 48% with 10 ppm .
Tantalite, Tin, Tungsten, Copper And Cobalt Concentrates..