SiO 2 (silicon dioxide) Quartz is one of the most widespread minerals in the earth's crust, a rock-forming mineral in most igneous and metamorphic rocks. More details Products Crystals Mark 1 Crystals Mark 2 Crystals One Quality policy Application Quality Achievements Crystal sections Photo gallery Photos 1 - 9 of 34 First | Prev | 1 2 3 4 | Track. | The end | All © JSC "South Ural Plant Crystal" 2008 Tel .: (35134) 4-33-12, Fax: (35134) 4-33-20 Russian English ↑ ↑ Main About the enterprise For investors Products Photo gallery Partners News Contacts For energy consumers