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 ...

Impurities in the container could react with the molten silicon, so you need an equally pure quartz crucible to hold it. Most chip makers and their suppliers have enough silicon wafers or silicon ...

It’s the quartz, however, that stands out today. Because the mineral formed in an area with almost no water, it’s ...