Graphite is the soft grey heart of a pencil, so dream books read it as drafts, notes and ideas that can still be erased. It stands for plans not yet made permanent.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.