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6. Quartz has a hardness of...

  • 5
  • 8
  • 4
  • 7
  • 6

7. Orthaclase Feldspar colour is

  • grey
  • white/pink
  • green/black
  • dark red

8. Plagioclase feldspar has a streak of which colour

  • white
  • green
  • red
  • pink
  • grey