Eiffel Tower, Set of 4 Sandstone Coasters by Thirstystone by Thirstystone. $18.95. Cork backing to protect furniture; Sandstone from Southwest US Quarries; Made In The US; 4 inches in diameter; Set of 4 Natural Sandstone Absorbent Coasters. Thirstystone quarries their sandstone for the Coasters in the Southwestern United States using the most environmentally conscious methods to extract the sandstone boulders that will be crafted into Thirstystone coasters. Thirstystone Sands... Coaster Holder, Sandstone Coasters, Accent Pieces, Vintage World Maps