Ruby and sapphire are oxides of ____. , 1) Copper,2) Tin, 3) Iron, 4) Aluminium, "> Ruby and sapphire are oxides of ____. "/> Ruby and sapphire are oxides of ____. , Copper, Tin, Iron, Aluminium, "/>
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Ruby and sapphire are oxides of ____.
  • Copper
  • Tin
  • Iron
  • Aluminium


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