we are sourcing tungsten concentrate for APT and tungsten powder processing for long time Please check the specs followings . Those who export or deal the materials contact me for details . lydia at beseemcn dot com skype : beseemcn Tungsten concentrate , color : black purity : WO3, 45% or more Scheelite Color: white Purity : wo3, 50% Request quantity: 50tons per monthly packing: 50kg per bag with plastic bags inside Show More