Why is obsidian so sharp?

Related questions

1. What's the difference between Onyx and Obsidian?
2. Is Blue Obsidian natural?
3. Are Apache tears obsidian?
4. How do you cleanse and charge black obsidian?
5. Can Obsidian cut through steel?
6. Why is obsidian important?
7. Is green obsidian man made?
8. Does black tourmaline need cleansing?
9. Is Obsidian good luck?
10. Where is Onyx found?

Tags

1. #processes
2. #naturally
3. #jagged
4. #glassy
5. #black
6. #thick
7. #edges
8. #under
9. #flaking
10. #sharp
11. #could
12. #using
13. #pressure
14. #occurring
15. #process
16. #blade
17. #obsidian
18. #electron
19. #volcanic
20. #microscope
21. #their
22. #carefully
23. #glass