A fabulous natural uncleaned quartz crystal cluster from Arkansas that has a square back bottom. This cluster formed on top of a single calcite crystal which later weathered out leaving a large square cavity on the bottom. This beauty has a brown/orange iron oxide coating with lots of black botryoidal goethite. Stands up on its own. Weighs 2.5 oz. Size: 3 1/8" long x 1 1/2" wide x 1 7/8" tall.