Final answer:
Feldspars make up half of Earth's crust - they are part of the group of silicate minerals that constitute around 92% of the crust, along with quartz being another prevalent mineral.
Step-by-step explanation:
The minerals that make up half of Earth's crust are feldspars. Feldspar is a group of silicate minerals that are extremely common in the earth's crust. Silicate minerals, which are structures based around the silicon-oxygen tetrahedron, compose about 92% of all minerals in Earth's crust. In addition to feldspars, quartz is another very common mineral in Earth's crust.
To give you more insight, the Earth's crust, which includes oceanic basalt and continental granite, is largely composed of silicate minerals. These are the materials comprising igneous rock, which forms when magma cools and solidifies.
Oxygen and silicon are the two most abundant elements in the earth's crust, with oxygen accounting for 47 percent by weight and silicon for about 28 percent.