What type of rock is obsidian?

Related questions

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2. Is Obsidian radioactive?
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4. How do you shape obsidian?
5. Is green obsidian real?
6. How do you cleanse Obsidian?
7. Is Obsidian dangerous?
8. Are Apache tears obsidian?
9. Can Obsidian cut through steel?
10. What can you make with Obsidian?

Tags

1. #igneous
2. #volcano
3. #cools
4. #produced
5. #rapidly
6. #obsidian
7. #formed
8. #growth
9. #minimal
10. #extruded
11. #naturally
12. #occurring
13. #crystal
14. #volcanic
15. #glass
16. #extrusive
17. #felsic