Lots of things to take into acount like price of gold size and type of deposit depth location tax ect the list is endless.

This rule helps to avoid mistakes as what may look good might not be economic.

ie 1.83 meters of 15.55 grams (6 feet of 0.5 troy oz) = 3 is ok in canada near road.

But most important to me is size of deposit then size of deposit then size of deposit