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| Silicon Dioxide Silica | Aerosil | Aerosil 380 | Cristobalite | Quso G-32 | Quso G32 | Sand | Tridymite | Dioxide, Silicon Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. |