... 2.Vermiculite Size : Raw gold vermiculite0-30um,0.3-0.65mm,0.65-1mm 20-40mesh,10-40mesh, ... silver vermiculite0.25-0.7mm,0.3-1mm,1-2mm,2-4mm,3-8mm,4-8mm,20-40mesh,40 ... ,0.3-1mm,3-6mm,4-8mmExpandedsilver vermiculite 0.3-1mm ,1-2mm,2-4mm,1-3mm,3-5mm,3-6mm, ... 4-8mm 3.Vermiculite chemicalsCompositionSiO2MgOAl2O3Fe2O3CaOK2OphPercentage37-4211 ...