• 1. 
    How much does a carat weigh, in milligrams?

  • 800
  • 200
  • 400
  • 50
  • 2. 
    To which of these materials is a diamond most closely related?

  • rice
  • carbon
  • air
  • water
  • 3. 
    What is the name for a dark volcanic rock?

  • sea salt
  • slate
  • sandstone
  • basalt
  • 4. 
    Which of these is not a type of rock?

  • igneous
  • sedentary
  • metamorphic
  • sedimentary
  • 5. 
    Which of these is a kind of stone?

  • meerkat
  • meerschaum
  • mirror
  • borscht
  • 6. 
    What melts to form volcanic lava?

  • rock
  • diamonds
  • clay
  • tree roots
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