Egypt possesses the largest reserve of quartz ore in the world With a purity of 99.9%, with a reserve of 27 million tons in the Eastern Desert in Marsa Alam The cost per square meter of quartz slab is about 100 euros Quartz is used in many global industries Including electronic chips for computers, cars, all wireless transmitters, and cells for solar energy. Quartz sand is also used in the railway and mining industries because of its durability, as well as in the manufacture of jewelry, glass, watches, ceramics, in the petroleum industries, and many others. It is also characterized by being antibacterial, anti-virus, infrared, and ultraviolet. High temperature, so it is used by hospitals and intensive care rooms.