Rocks for rock identification Quiz
1. Obsidian
2. Scoria
3. Sandstone
4. Quartz
5. Petrified Wood
6. Pumice
7. Coral
8. Granite
9. Agate
10. Thunder Egg
2. Scoria
3. Sandstone
4. Quartz
5. Petrified Wood
6. Pumice
7. Coral
8. Granite
9. Agate
10. Thunder Egg
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