But its a great indicator. Just because you don't find gold in your pan doesn't mean its not there. Try to find the place where the heavies are settling out, ( ie galena, ilmenite, lead shot, and other chunky stuff). If you find a couple such spots and there's no gold in them, then it doesn't look good for gold. But don't give up, even streams that have good gold have places where there's no gold at all. Try to get to bedrock/false bedrock but even that is not always a reliable indicator since it may have been worked in the past, or the geology changed, etc.