Sandpaper Painting. Charcoal on board with applied marble dust, also known as a Marble Dust Painting, circa 1850, this scene is an unusual subject as most were typical Hudson River Valley pastoral scenes. This example appears to be Venice. In very good unrestored condition. Framed in a period frame under old glass with archival backing. Painting size 18"x28", Framed size 21"x31".