Occurrence :: A mineral of secondary origin, commonly produced under tropical climatic conditions by the prolonged weathering of aluminum-bearing rocks. Also at times derived from the weathering of clay-bearing limestones. It has apparently originates as a colloidal precipitate. It may occur in place as a direct derivative of the original rock or it m ay have been transported and deposited in a sedimentary formation. In the tropics, deposits, known as laterites, consisting largely of aluminum and ferric oxides are found in t the residual soils. These vary widely in composition and purity but may at time become valuable as sources of aluminum and iron.

USAGES: Because graphite flakes slip over one another, giving it its greasy feel,

• Graphite has long been used as a lubricant in applications where lubricants, such as oil, can not be used
• Natural graphite is used in refractory applications.
• To make Brake Linings, Lubricants and Molds in foundries.