Mining In Nigeria Still Crude

By now, everyone should know the main cause of the lead poisoning. You know (that) gold is hardly seen in hand specimen until detailed analysis is carried out; the gold that they are mining in Zamfara from the rock crystals and the method of mining is the main problem: the people mine it in a crude form; they carry it from the site to a settlement to process; they carry the ore to their houses to crush, using ordinary crushing machine, and this is why I keep saying that the level of our mining sector is a little bit crude. In fact, most of the jobs that need to be done by machines at mining sites are being done by hand. They carry these things to the house and use the ordinary machines used for grinding tomatoes to grind gold containing rock (because it has to made into powder form; since there is gold in the rock, you want to disaggregate it, you want to remove the gold , so you have to crush it to certain grain sizes)
http://leadership.ng/nga/articles/16942/2012/02/21/mining_nigeria_still_crude_%E2%80%94_ohikere.html