Sand/ Dirt Mineral Filled From Sacramento River In California, Found A Good Spot For Sale

This includes one full padded USPS flat rate envelope

I found a spot in the Sacramento River where I believe it contains large amounts of minerals including gold and silver possibly.

I took three jars and filled them halfway full of the sand from the bottom of the riverbed where there\'s a kind of like a little Gauntlet  where the water rushes and gets stuff caught in roots. and I dug down in there,there was some black sand and I put some in jars and kept washing it out until the dirt was all gone and then I took these pictures.

Keep in mind I like doing experiments and I have done this at several different locations in Sacramento River with not nowhere near the same results.