Outstanding Picture Clear Quartz Point Home Décor Statement PieceOutstanding Picture Clear Quartz Point Home Dcor Statement Piece Weight 0. 115kg Size 7. 5cm by 4cm Thickness 3. 5cm Quartz is the most common and widely distributed mineral in the earths crust. It consists of oxygen and silicon (silicon dioxide). This crystal can be formed in numerous ways and occurs in most metamorphic and igneous rocks, especially in gneiss and granite. Since it resists weathering, you can find quartz in gravels and alluvial sands.