These are the answers to the test.
1. Amethyst Quartz
2. SiO2
3. 7
4. Mineral
5. Gneiss
6. Metamorphic
7. The darker bands have relatively more mafic minerals, while the lighter bands contain relatively more felsic minerals
8. 2.6-2.9
9. Amazonite
10. Mineral
11. Feldspar
12. Conchoidal
13. Pumice
14. Igneous
15. Abrasives
2. SiO2
3. 7
4. Mineral
5. Gneiss
6. Metamorphic
7. The darker bands have relatively more mafic minerals, while the lighter bands contain relatively more felsic minerals
8. 2.6-2.9
9. Amazonite
10. Mineral
11. Feldspar
12. Conchoidal
13. Pumice
14. Igneous
15. Abrasives