Created in celebration of the exhibition Sargent and Spain at the Legion of Honor museum in San Francisco, this absorbent sandstone coaster features John Singer Sargent's Pomegranates, Majorca, 1908. he stone coaster lets condensation sink in, keeping your furniture safe from staining and discoloration. If your coaster becomes stained, soak in hot water with a mild liquid detergent for 60 minutes, rinse thoroughly, and let air dry. For stubborn stains, use one part household bleach and three parts hot water and soak overnight. Measures 4 x 4 in.