Quartzite is a hard, metamorphic rock formed from the transformation of sandstone under high heat and pressure. It primarily consists of quartz grains, which are tightly bonded together, making it durable and resistant to weathering. This rock is often used in construction and landscaping due to its strength and attractive appearance. Quartzite can come in various colors, including white, gray, and pink, depending on the mineral content. Its unique texture and patterns make it a popular choice for countertops, flooring, and decorative stone.