1.expanded silver vermiculite ore 2.density:120-300kg/m3 3.Size ... 4,4-6mm 4.Use:agriculture,Horticulture etc. expanded refractory silver vermiculite ore offers in xinjiang1.Features Fireproof, heat insulating, ... non-toxic, odorless, non-abrasive, etc..2.Size Golden/Silver Vermiculite1-3mm,2-4mm,3-8mm,4-8mm,10-20mesh ... negotiable based on specification, quantity, delivering time etc. silver vermiculite