Across
- 1. element that helps immune system
- 4. twin mines
- 5. level 10 hardness
- 7. study of rocks
- 9. made from Earth debris
- 12. component of limestone
- 14. way to tell what a rock is
- 15. more than 90% of volcanic rock on Earth
- 17. swiss cheese rock
- 19. solid pure form
- 20. Decorah
- 21. nonmetallic rock
- 22. lowest layer in minecraft
- 23. big rock
- 25. preserved remains
Down
- 2. began as sediment and cemented together
- 3. don't judge a book by it's cover
- 6. sidewalk
- 7. rough road
- 8. thought to heal
- 10. used in drywall, paint, and cars
- 11. small rock
- 13. main source of the material lime
- 16. birthstone of February
- 18. rocks from volcano
- 24. mass of minerals