Porbandar, the largest producer of chalk powder in Asia. Porbandar, the place famous for being Mahatma Gandhi's birthplace is also the largest manufacturer of quality natural chalk powder in Asia that is mined and processed at a nearby town Adityana. For over five decades, this chalk powder has been used as one of the prime raw materials in the rubber, paint and putty industries.
Bauxite is the most important aluminium ore. Barytes mMineral consists largely of the minerals gibbsite Al(OH)3, boehmite ?-AlO(OH), and diaspore a-AlO(OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.