Quartzite: Definition: Quartzite is a metamorphic rock primarily composed of quartz. Formation: It forms when sandstone, composed primarily of quartz grains, is subjected to high temperature and pressure, causing the quartz grains to recrystallize and fuse together. Characteristics: Quartzite is typically very hard, dense, and resistant to weathering. Uses: It's used in construction, as a raw material for producing ferrosilicon and other industrial products, and for decorative purposes. Purity: High-purity quartzite can have a silica content of 98% to 99.2%. Quartz Lumps: Definition: Quartz lumps are naturally occurring, irregularly shaped masses of the mineral quartz. Formation: Quartz is one of the most common minerals on Earth and can be found in various geological formations. Characteristics: Quartz lumps are known for their high purity and hardness, and they are resistant to weathering. Uses: Quartz lumps are a valuable raw material for various industries, including construction, manufacturing, and ornamentation. They can be processed into different sizes and forms for specific applications. Purity: High-purity quartz lumps can have a silica content exceeding 99.9%. Key Differences: Geological Origin: Quartzite is a rock formed from sandstone, while quartz is a mineral that can be found in various rock types. Structure: Quartzite is a mass of fused quartz grains, while quartz lumps are individual pieces of the mineral. In essence, quartzite is a rock containing quartz, while quartz lumps are pieces of the mineral itself.