It will be interesting to see if this works. The level of 'metal' in the rock would depend on the size of the rock. If you found a big rock that was majority metal, that would be cool. But it's pointless if their is only 'little bits of metal' inside, by the time u melt it in heat and extract the metal, the cost of doing such thing will not be worth extracting the metal. I will definitely check what the metal ratio to rock is in Sanaag.