During growth, this vug obvioously had a thin septa, because smithsonite grew on both sides of this rind. The viewing side is covered in small clusters, to .6 cm across, of translucent, green, rice grain, crystals of smithsonite. However, the key to this specimen, is the subsequent growth of malachite coated, copper crystals, in a dendritic pattern, reaching 1.0 cm across. Rare and Exotic combination!