mohs scale

  1. Noun talc.
  2. Noun gypsum.
  3. Noun calcite.
  4. Noun fluorite.
  5. Noun apatite.
  6. Noun orthoclase.
  7. Noun vitreous pure silica.
  8. Noun quartz.
  9. Noun topaz.
  10. Noun garnet.
  11. Noun fused zirconia.
  12. Noun fused alumina.
  13. Noun silicon carbide.
  14. Noun boron carbide.
  15. Noun diamond.