After sifting out some of the debris in your pan, you may begin to see small traces of gold dust on the sides of your pan. Be careful how you get that out, you'll probably have to get that out with your finger or wait until you've sifted more debris out of your pan to get to it. Gold is supposed to be denser and heavier than most other materials in the water, however you tend to see gold on the top many times when you're panning.