I found no gold in the 8-mesh screen.
I dumped the 12-mesh screen into my pan, and a speck of gold sat on the edge. It was the only one in the screen, and it wanted to save me some trouble finding it, I guess.

In the 20-mesh screen, I found two pieces.

For reference, a 20-mesh screen has 20 holes per linear inch. So each hole is about 1/20 of an inch in size.
Here is a pic of the other piece, but not zoomed in:

In the 50-mesh screen, the mud is quite heavy, so I am doing it in smaller batches. There is more black sand, mostly iron (hematite and magnetite), making it more difficult to separate the gold from it.
But so far, so good.

I pulled it out of the sand to get a better look at it.

This tiny nugget has an interesting look; almost like a gold rose. This is still the 50-mesh screen, so that is 50 holes per inch, making each hole about 1/50 inch in size.

I still have a ways to go, but so far these are more of the 50-mesh pieces that appeared in the pan.

I haven't even started on the 100-mesh screen or everything smaller that fell into the bucket. Those take a lot of patience because they are so tiny; it is easy to lose them if you're not careful.
I plan to be very careful.
😁