I think it's important for us to clarify what Dan is saying here, just to be safe. It would seem he's implying that this 'gold' is difficult to find within the aforementioned 'dust.' Ergo, the gold must also be 'dust;' gold dust, you see. Tricky indeed. You may want one of
these. Also, you will want some water on hand, because the materials are 'dry' and it appears that you cannot use the linked tool above without liquid.
Trent