BariteWorld Amorphous Graphite is a naturally occurring mineral. Contrary to its name, this is not an amorphous material, but rather a microcrystalline form of natural graphite. Except for extremely fine grinds, which have a flakey structure, it is granular. This type of natural graphite is referred to as "amorphous." The material is available in a variety of sizes, ranging from 1 cm and smaller particles to 10 cm lumps.