Mining

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Across
  1. 5. common iron ore (compound)
  2. 6. the name of the process of removing valuable minerals, coal or oil from the ground
Down
  1. 1. first step in mining
  2. 2. metal alloy that is made of iron
  3. 3. rock or sediment containing a valuable mineral
  4. 4. region of WA where Rio Tinto's most advanced mine is located