Respuesta :

Explanation:

1. Agate

2. Aquamarine

3. Amethyst

4. Coal

5. Bauxite

6. Copper

7. Diamond

8. Natural gas

9. Iron

10. Jade

11. Magnesium

12. Mercury

13. Nickel

14. Onyx

15. Gold

16. Oil

17. Silver

18. Ruby

19. Titanium

20. Pyrite

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