Quartz lumps are a type of mineral consisting mainly of silicon dioxide (SiO2), one of the most abundant minerals found in the Earth's crust. Quartz lumps have a hexagonal crystal structure and are available in various colors, including white, pink, yellow, grey, and brown, depending on the impurities present in the mineral. Web - https://pratibharefractory.com/supplier-of-quartz-lumps/