What type of rock is diamond? What type of rock is graphite?
Diamond is a crystal form of Carbon in a isometric-hexoctahedral crystal lattice contained within (amongst others) Kimberlite (Rock). Kimberlite being a metamorphic rock. Graphite can be found in three types of Ore deposits: 1.Flat Plate Graphite or Crystalline Flake Graphite 2.Amorphous Graphite, forming from metamorphosed Coal deposit 3.