Quartz, squartz stone, slabs.
Quartz lumps, quarts powder and quarts greets.
Classic quartz.
Monocrystalline silicon wafer quartz cruicble.
Silica quartz lumps & fines.
"A" glassy quartz, milky white, fully dressed lumps, powder & sand having 99.76% sio2.
Pure silica quartz.