... Vermiculite size Raw golden vermiculite0-30um,0.3-0.65mm,0.65-1mm 20-40mesh,10-40mesh, ,0.3-1mm1.5-2.5mm,1 ... -80mesh 60-100mesh, 200mesh,325mesh,400mesh Raw silver vermiculite0.25-0.7mm,0.3-1mm,1-2mm,2-4mm,3-8mm,4-8mm ... ambient conditions5.Vermiculite chemicals CompositionSiO2MgOAl2O3Fe2O3CaOK2OphPercentage37-4211-239-173.5-181-25-87-11The chemical analysis of both crude and exfoliated vermiculite ...