... running ISO9001-2000 quality management system, dealing Vermiculite for over 15years,with best service,compatitive price and acceptable quality,get high ... Silver-grey type ( Fe2O3 content around 5-8%, similar with South Africa vermiculite); the other type we call Golden- ... yellow type (Fe2O3 content around 16-23%, similar products with India and Australia).Normally the white type used as refractories ...