Skip to content
Back to quiz
6. Fire Opal
- Metamorphic
- Igneous
- Sedimentary
7. Granite
- Igneous
- Sedimentary
- Metamorphic
8. Rhyolite
- Metamorphic
- Igneous
- Sedimentary
9. Slate
- Sedimentary
- Metamorphic
- Igneous
10. Conglomerate
- Sedimentary
- Igneous
- Metamorphic
11. Gneiss
- Metamorphic
- Igneous
- Sedimentary
12. Pumice
- Igneous
- Sedimentary
- Metamorphic
13. Hornfels
- Sedimentary
- Metamorphic
- Igneous
14. Oil shale
- Sedimentary
- Igneous
- Metamorphic
15. Coal
- Sedimentary
- Igneous
- Metamorphic
16. Andesite
- Metamorphic
- Igneous
- Sedimentary
17. Flint
- Metamorphic
- Sedimentary
- Igneous
18. Limestone
- Metamorphic
- Sedimentary
- Igneous
19. Shale
- Sedimentary
- Igneous
- Metamorphic
20. Obsidian
- Metamorphic
- Igneous
- Sedimentary