Fascinating features of ores and minerals
 
  
    - Malachite is  mainly copper carbonate,  CuCO3. Cu(OH)2.
- This  green-colored mineral crystallizes in the monoclinic crystal system.
 
  
 
  
    - Hematite is the mineral of iron(III)  oxide (Fe2O3).
- It is colored  black to steel or silver-gray, brown to reddish brown, or red.
 
  
    - It is the mineral of Magnesium Carbonate (MgCO3),and is the ore of magnesium.
- Magnasite is a slag former in  steelmaking furnaces.
- Used as a catalyst and  filler in the production of synthetic rubber and in the preparation of   chemicals and fertilizers.
 
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