장석, or "Jangseok," is a type of mineral known as "feldspar." It is commonly found in igneous rocks and is characterized by its glassy luster and various colors, including pink, white, and gray. This mineral plays a significant role in the formation of granite and other rocks, making it essential for geological studies. In addition to its geological importance, 장석 is widely used in the manufacturing of ceramics, glass, and porcelain. Its ability to withstand high temperatures makes it a valuable component in these industries, contributing to the durability and quality of the final products.