Graphite is a crystalline form of carbon that is a very good conductor of electricity and heat. It is a mineral that is commonly found in metamorphic and igneous rocks. Graphite has a layered structure in which the carbonatoms are arranged in hexagonal rings, with each layer being weakly bonded to the adjacent layers. This structure gives graphite its characteristic properties, such as its ability to easily slide over one another, making it a good lubricant.