quartz sand refined
Making Silicon from Sand | Popular ScienceOct 16, 2005 . Its oxide form, known as silica or quartz, is dirt-common. In fact, it is dirt: Almost all kinds of sand, clay and rock contain silica in one form or.quartz sand refined,Refining Silicon | PVEducationIt is further refined to produce semiconductor grade silicon. . While beach sand is also largely quartz, the most common raw material for electronic grade is high.