S1I1L1I1C3A1S1
9 points
SILICAS is validvalid
SILICA, a form of silicon [n]
SILICA, silicon dioxide or silicic anhydride, occurring in nature as quartz, chalcedony, etc. [n]
SILICA, a form of silicon [n]
SILICA, silicon dioxide or silicic anhydride, occurring in nature as quartz, chalcedony, etc. [n]