Of course grade matters for open pit mining - usually the higher the grade the lower the mining costs and of course the less ore needs to be processed - so you might be able to get away with a smaller processing plant - which means less costs to set up the mining operation.
Maybe it is you who needs to be aware of the facts.
If you wish to dispute this, go ahead Fishhead. I've got too much on my plate than to get involved in a tit for tat forum debate.
Cheers.
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