<Li> Crystalline small flakes of graphite (or flake graphite) occurs as isolated, flat, plate - like particles with hexagonal edges if unbroken . When broken the edges can be irregular or angular; </Li> <Li> Amorphous graphite: very fine flake graphite is sometimes called amorphous; </Li> <Li> Lump graphite (or vein graphite) occurs in fissure veins or fractures and appears as massive platy intergrowths of fibrous or acicular crystalline aggregates, and is probably hydrothermal in origin . </Li> <Li> Highly ordered pyrolytic graphite refers to graphite with an angular spread between the graphite sheets of less than 1 ° . </Li>

Where is graphite found in the united states