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 ...

it's made out of a semiconductor crystal. The chip starts out as a thin wafer of P-type silicon. This is then coated with a layer of silicon dioxide -- kind of a silicon rust, which doesn't ...

But although about 75% of the Earth is made from silica — or silicon dioxide (SiO 2), the main ... and power transistors to solar cells, liquid-crystal displays, and semiconductor-based detectors.