Flat metamorphic rock formerly used in schools - Everyday Puzzles

Here are all the answers for the "Flat metamorphic rock formerly used in schools" question from the popular Everyday Puzzles game! Developed by Fanatee Games, this engaging game often presents tricky puzzles, and if you’re here, you might be stuck on this particular crossword. Don’t worry - we’ve got you covered with the solutions to all Everyday Puzzles levels! Increase your vocabulary and general knowledge. Become a master crossword solver while having tons of fun, and all for free!