The Mohs Scale lists ten minerals according to relative hardness. The scale is graduated from No. 1 (Talc, a very soft stone) through No. 10 (Diamond, the hardest stone).

  1. Talc
  2. Gypsum
  3. Calcite
  4. Fluorite
  5. Apatite
  6. Orthoclase
  7. Quartz
  8. Topaz
  9. Corundum
  10. Diamond