graptolite (n.)

word-forming element meaning "process of writing or recording" or "a writing, recording, or description" (in modern use especially in forming names of descriptive sciences), from French or German -graphie, from Greek -graphia "description of," used in abstract nouns from graphein "write, express by written characters," earlier "to draw, represent by lines drawn," originally "to scrape, scratch" (on clay tablets with a stylus), from PIE root *gerbh- "to scratch, carve" (see carve).

before vowels, lith-, word-forming element meaning "stone, rock;" from Greek lithos "stone, a precious stone, marble; a piece on a game board," a word of unknown origin.