Hit a creek in NW'ish IN yesterday. Very swift current, very hard clay bottom, some sand areas/gravel areas/bigger rock areas and deep holes. Under cuts the lands around it, lots of washouts leading into it, lots of uprooted trees and gravel spills on the edges. Got the biggest black sand I've found so far this year, lots and lots of shiny gold specs that stayed behind the other black sands in the pan. When dried out and check with my microscope viewer, it was just some sort of black sand that has shiny gold spots marbled in with green/red/purple colors also. Lots of micro garnet stones, micro pink/clear/green/yellow/orange clear stones also. No gold.