2. Moissanite (Mohs hardness: 9.5)
3. Corundum (Mohs hardness: 9)
4. Topaz (Mohs hardness: 8)
5. Beryl (Mohs hardness: 8)
6. Quartz (Mohs hardness: 7)
7. Orthoclase feldspar (Mohs hardness: 6)
8. Plagioclase feldspar (Mohs hardness: 6)
9. Hornblende (Mohs hardness: 6)
10. Augite (Mohs hardness: 5.5-6)