A "graphite pencil" refers to a writing tool made of wood, with a black substance called graphite inside that leaves marks on paper when used. Full definition
They are graphite pencil on paper, not charcoal on paper. (nytimes.com)
Detailed photo realistic artwork of insects, animals and found objects, rendered in graphite pencil, and sometimes a hint of coloured pencil. (artweb.com)
It is done with graphite pencil, ink and colored pencil on heavy cotton rag paper. (nakedpastor.com)