re: zinc shares
And if you are looking for one which has not been recognized by the market yet, look at MTB.
The Zinc project currently has a projected NPV of 354c per share with a bigger resource currently being explored.
It will be an open cut mine, low cost miner and any increase in the Zinc price should push the current resource up by something like 0.17c per share per $1 increase in the Zinc price.
Currently its trading at 2% of its projected NPV !! with JORC and pre feasability study out this year.