yes, an opinion, perhaps a good huntch,, 5,72, ahh just say 6 oz per ton,, yard,, some will argue the other holes are less, granted,, but still strong,, also perhaps the yet to be disclosed holes will garner more tha 6 OZ? , remember 3 miles long,, some of these veins go 1-2 miles deep in african mines,, then the arrival of mr. hooper,, we shall see!