What's the difference between Onyx and Obsidian?

Related questions

1. What is green obsidian used for?
2. Is Obsidian the sharpest known material?
3. What is Onyx worth?
4. Is green obsidian real?
5. What can break obsidian in real life?
6. Does Obsidian need to be cleansed?
7. Is Obsidian a gem?
8. How do you clean Obsidian?
9. Is green obsidian natural?
10. Is Obsidian the sharpest material?

Tags

1. #black
2. #impurities
3. #stones
4. #contain
5. #obsidian
6. #cools
7. #silicon
8. #molten
9. #other
10. #difference
11. #colors
12. #volcano
13. #between
14. #quickly
15. #water
16. #erupts
17. #which
18. #reaching
19. #formed