Is green obsidian natural?

Related questions

1. Is Obsidian the sharpest known material?
2. Is Obsidian a semi precious stone?
3. Can you sharpen Obsidian?
4. How do you clean black obsidian?
5. Can you tumble Obsidian?
6. How do you clean Obsidian?
7. Can Obsidian cut through cells?
8. Is Obsidian fragile?
9. Is Obsidian the same as Apache tears?
10. What is the difference between jet and obsidian?

Tags

1. #natural
2. #mineraloid
3. #mineral
4. #glass
5. #occurring
6. #formed
7. #addition
8. #classified
9. #naturally
10. #extrusive
11. #green
12. #sometimes
13. #composition
14. #volcanic
15. #crystalline
16. #because
17. #variable
18. #obsidian
19. #igneous