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2023-09-29 09:21 altermaven  
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If you played alchemyst dig 3 you're aware of a similar level but this one is a little .. different.  
  
malachite is a carbonate mineral. more specifically, it is copper carbonate hydroxide. specifically, it is the copper in this mineral that gives it the green colour.  
  
malachite, combined with azurite, has been used as indicators of copper ore veins, which has indirectly lead to the discovery and naming of the element known as nickel. However, nickel deposits come from a different mineral: annabergite.  
  
the relativity of malachite to copper gives it a low mohs hardness: 3.5 to 4.