... in flake, high density, low content of mica Crystalline Flake Graphite is a crystalline carbon, natural non-metal mineral. It is ... iron oxide black or dark gray. It is soft and greasy. It belongs to hexagonal crystal system. It is ... and hardness of 1.Applications:Refractory Bricks,Crucibles,Foundries,Ceramics,Graphite Moulds & ect.Advantages:Different sizes available,single mesh,or blended ...