My brother and I have been gold mining since the mid-1990s. Originally we would dredge all day and then cleanup and pan the dredge concentrates directly in the field. We found out that we were missing some of the gold by just panning in the field, so we started to save the dredging concentrates for further reclamation at the cleanup shack back home. We would still pan out in the field and remove any pickers and large flakes, but now instead of panning directly into the river, we save the concentrates. After running the secondary concentrates thru the gold wheel here is what we found:
As you can see, it really pays off to take your gold dredging concentrates home for final gold removal! We missed a lot of gold in the field!
Here’s a video describing our gold concentrates methods: