Chemically, quartz is nearly pure silicon dioxide (SiO 2). When there are no impurities, pure quartz is water-clear and often referred to as “rock crystal”. Impurities can give transparent ...

In case you missed that, a tube furnace is basically a long, fused quartz tube wrapped in electrical ... the task by creating a thin layer of silicon dioxide on a scrap of silicon wafer.

Quartz countertops have become increasingly ... lung disease caused by inhaling very tiny crystalline particles of silicon dioxide, or silica, according to the Cleveland Clinic.