Apparently gold was discovered in Marble Hill, Missouri. The source of the news comes from the May 26, 1866 Charleston Daily News (Charleston, S.C.) and at the time Marble Hill was called “Dallas”.
According to the paper a rock which served as part of the foundation of a house that had been burned during the Civil War. The paper states that when the rock was ground up $60 worth of gold was refined from it. The paper also reported that the rock came from a local quarry just outside of town.
This is the first time this writer has ever heard of gold being discovered in the Southeast Missouri Ozark Foothills of Bollinger County, Missouri and as far as I know this was the only time gold was ever discovered here.