Across
- 3. red precious stone
- 4. Midas favorite gold
- 6. often used in sandpaper
- 8. purple variety of quartz
- 10. dioxide used by plants
- 12. mercury-containing mineral
- 14. dark mica
- 16. Fools gold
Down
- 1. A green precious stone
- 2. main ingredient of drywall
- 5. a common cave-forming mineral
- 7. used in powders
- 9. found on dinner tables
- 11. light mica
- 12. burnable rock
- 13. an aluminum ore
- 15. Given off by plants