Cov tshuaj lom neeg sib xyaw ua ke ntawm cov hlaws dai ntab yog feem ntau yog silicon dioxide thiab txhuas oxide. Nws muaj ntau yam ntxwv xws li cov khoom me me, khoob, lub teeb yuag, lub zog siab, hnav tsis kam, kub tsis kam, rwb thaiv tsev thermal thiab nplaim taws retardant. Nws yog dav siv rau hauv ib qho ntawm cov ntaub ntawv raw rau kev lag luam refractory.