... , transparent, no bubbles and impurity. widely used in blasting, polishing, grinding etc. Glass beads with the quality of clean, transparent, no ... other materials so that it widely used in blasting, polishing, grinding etc. Chemical AnalysisPhysical PropertiesSiO2≥65.0%Bulk Density1.5g/cm3Na2O ... #200-32575-45 All sizes can be supplied as required. Grinding Glass Beads