#1 and 2 are old clay filter media that someone colored with majic marker to resemble old marbles. They are found often on ebay. #3 is a bennington glazed porcelain marble from the early 1900s. #4 is beat up but it looks like it would have been a prize if it was in good shape. It's a West Virginia swirl. #5 is a marble king from the 60s maybe. Cool finds!