A marvelous high quality very clear square back quartz crystal cluster from Arkansas that has two time-link activations, a double terminated point, and a rainbow. This cluster is called a square back because it formed on top of a calcite bed which later weathered out leaving two square cavities on the bottom. Stands up on its own. Weighs 5 oz. Size: 3" long x 2 1/4" wide x 2 3/4" tall.