1.This is 325M Quartz Powder. 2.It is used in inner layer for shell-making. ... 3.It is used in investment casting. 1.The Quartz powder`s main component is quartz.2.the density is 2 ... kinds of flat glass, wire glass, patterned glass, hollow glass, foam glass, glass tiles, all kinds of packaging bottles, glassware, such ... exterior wall coating , road painting line paint...... 325M Fused Quartz Powder