feldspar

Feldspar is a group of common minerals found in many types of rocks, especially igneous rocks like granite. Comprising about 60% of the Earth's crust, feldspar plays a crucial role in geology. It comes in several varieties, with potassium feldspar and plagioclase being the most well-known. Feldspar is significant in the production of ceramics and glass due to its ability to withstand high temperatures. Its presence can also help determine the formation history of rocks, making it an important mineral for geologists studying the Earth's processes over time.