Some minerals in this class include microcline, a type of feldspar, and quartz.
One family in this mineral class exhibits an optical effect where light refracts in layered ingrowths that formed during the cooling process. That is the Schiller effect. The mineral at the base of the two branches of Bowen's reactions series belongs to this class and is plagioclase. One monoclinic group of this class is called micas. All of the minerals in Bowen's reaction series belong to this class. Some minerals in this class include microcline, a type of feldspar, and quartz. These minerals make up most of the earth's crust. For 10 points, name this class of minerals that contains oxygen and silicon.
One family in this mineral class exhibits an optical effect where light refracts in layered ingrowths that formed during the cooling process.
silicate [prompt on feldspars before mentioned]