A fabulous natural uncleaned square back quartz crystal cluster from Arkansas that has a dark brown iron oxide coating that has tiny barnacle crystals on the backside. This cluster is called a square back because it formed on top of a calcite bed which later weathered out leaving three square cavities on the bottom. Stands on its own. Weighs 5.5 oz. Size: 2 1/4" long x 2" wide x 3 1/4" tall. n0448 - Square Back