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Quartz is the second most abundant mineral in the Earth\'s continental crust, after feldspar. It is made up of a continuous framewQuartz is the second most abundant mineral in the Earth\'s continental crust, after feldspar. It is made up of a continuous framewQuartz is the second most abundant mineral in the Earth\'s continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2.
